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隧道工程英语专业词汇

初中英语情态动词详细用法归纳(含练习及答案)

初中英语情态动词详细用法归纳（含练习及答案） 1. can 的用法：（1）.表示能力、许可、可能性。表示能力时一般译为“能、会”，即有种能力，尤其是生来具备的能力.如：She can swim fast, but I can’t . 她能游得很快，但我不能。 I can see with my eyes. 我用眼睛看。could是can的过去式。表示过去的能力。 be able to do sth. 常常指经过努力，花费了时间和劳力之后才能做到某事。is/am/are able to do sth was/were able to do sth. （2）.表示许可，常在口语中。如：You can use my dictionary. 你可以用我的字典。（3）.表示推测，可能性，意为“可能”，常用于否定句和疑问句中，此时can’t 译为“ 不可能”。如：Can the news be true? 这个消息会是真的吗？—Can it be our teacher?那个人有可能是我们老师吗？—No, it can’t be our teacher. He is on a visit to the Great Wall.不可能。咱们老师正在游览长城呢。【例题】—I think Miss Gao must be in the library. She said she would go there. —No. She __be there, I have just been there. A.can’t B.mustn’t C.needn’t D.wouldn’t 【解析】根据下文“我刚去过那儿”可知，应为“ 不可能”，can’t 表示推测[答案] A could的用法：（1）.can的过去式，意为“ 能、会”，表示过去的能力。如：He could write poems when he was 10. 他十岁时就会写诗。（2）. could在疑问句中，表示委婉的语气，此时could 没有过去式的意思。如:Could you give me a hand? 你能帮我个忙吗？—Could I use your pen? 我能用一下你的钢笔吗? —Yes, you can.可以。（用could问，不能用could答。） 2. may的用法：（1）.表示请求、许可，比can 正式，如：May I borrow your bike? 我可以借你的自行车吗？You may go home now. 现在你可以回家了。【例题】—_______ I borrow your MP3? —Sure . Here you are. A. May B.Should C.Must D. Would 【解析】在此处表示请求，意为“ 做……可以吗”。答案：A (2) .表示推测，谈论可能性，意为“ 可能，或许”，一般用于肯定句中。如：It may rain tomorrow . 明天可能会下雨。She may be at home. 她可能在家呢. may not 翻译为“可能不” (3) .may的过去式为might ，表示推测时。可能性低于may。如：He is away from school. He might be sick. 他离开学校了，可能是他生病了。 (4) . 表示希望、祈求、祝愿，常可译为“祝愿”。通常是用may +主+V 例如：May you have a good time. 祝你过得愉快。May you be happy! 祝你幸福！May you succeed！祝你成功！ 3. must的用法： (1).must 表示主观看法，意为“必须、一定”。如：You must stay here until I come back.在我回来之前你必须呆在这儿。Must I finish my homework right now? 我必须现在交作业吗？(must引导的疑问句) 肯定回答：yes ,you must. 否定回答：No, you needn’t/ don’t have to (2) 其否定形式mustn’t表示“ 一定不要” “千万别” “禁止, 不许”. 如：You mustn’t play with fire. 你不许玩火。You mustn’t be late. 你一定不要迟到。 (3)must表示有把握的推测，用于肯定句,指百分百肯定。如: The light is on, so he must be at home now.灯亮着，他现在肯定在家。（4）①must 和have to 都有”必须”的含义，但侧重点不同： must强调说话者主观(自己）的看法。 have to强调客观（外力作用）的需要，也可以翻译为“不得不”。

地质录井综合录井专业英语词汇

c o m p l e t e s c r e e n完整屏幕 standard screen 标准屏幕 display screen 显示屏幕 edition screen 编辑屏幕 main screen 主屏幕 alphanumberic screen 数据屏 graphic screen 曲线屏 chromatograph screen 色谱屏 geological screen 地质屏 process window 处理窗口 SPM Stroke Per Minute 泵冲 TQ Torque 扭矩 Pump 1,2 1，2号泵 Pump Count 泵冲计数 Pit 1,2. 1，2号罐 Pit Sum , Pit Volume 泥浆罐总体积 MW Mud Weight 钻井液密度 PV Plastic Viscosity 塑性粘度 YP Yield Point 屈服点 ECD Equivalent Circulating Density 当量循环密度

PF=FPG Formation Pressure Gradient 地层压力梯度FRAC Fracture pressure gradient 破裂压力梯度 TG Total Gas 总烃，全量 TGN Total Gas Normalized 校正的全量 Trip Tank 起下钻罐Overpull 超拉 Hook Speed 大钩速度Hook Height 大钩高度Swab 抽吸力Surge 冲击力 Time On Slip 坐卡瓦时间 GWR gas water ratio 油水比 HD high density 高密度 CSP casing pressure 套管压力MASP maximum allowed surface pressure 关井最大允许地表压力FFP final flowing pressure 最终流动压力IHP initial hydrostatic pressure 初始流体静水压力FHP final hydrostatic pressure 最终流体静水压力ISIP initial shut-in pressure 初始关井压力FSIP final shut-in pressure 最终关井压力SICP shut-in casing pressure 关井套管压力

工程英语专业词汇

大梁girder 复式桁架complex truss 承受withstand 拉伸 stretch 屈曲 buckle 断裂brea k可行的feasible 地基土subsoil 面板deck 柔性的flexible 索 cable 桥台 abutment 传递 transmit 相交 intersect 推力 thrust The amount of bridge traffic 桥梁交通流量 jammed traffic 交通堵塞cost 费用financing 筹款Acquire 获取survey 勘察Tide 潮汐 Flood 洪水 current 水流 Bore 钻孔samples of soil and rock 岩土试样 Girder 大梁cantilever 悬臂梁truss 桁架arch 拱suspension 悬索location 地理位置 purposes 功用Span length 跨度Strength 强度harmony 协调 Alloy steels 合金钢 Steel wires 钢丝tension 拉力compression 压力bending 弯曲 shear 剪力torsion 扭矩Static loads 静载 vehicle 车辆impact 冲击vibration 振动Dynamic loads 动载live loads 活载tremors 地震震动Floating debris 浮物model testing 模型测试 Scale-down model test 缩尺模型试验Wind tunnel tests 风洞试验 Erect安装 cofferdams 围堰caissons 沉箱piles 桩上部结构 superstructure False work 脚手架 Floatation 浮运 cantilevering 悬 lifting 提升suspension悬吊 signs 标识 guardrails 护栏 Sea Works海洋工程maritime engineering 海事工程 Fishing ports渔港 marinas码头Reclamation and conservancy填海与保护 Maintenance 维护 estuaries河口Hydraulic水力的 Natural harbor天然海港 artificial harbor人工海港 Tidal cycle潮汐周期 scour冲刷 siltation淤积 breakwater防波堤 Secondary wave次生波 Reflected wave反射波 disturbances干扰 Bay海湾 jetty防波堤mole防波堤 locality地区 conservancy保护 ruin废墟 wharf码头alluvial冲积的 destructive破坏的 bar沙滩 anchorage锚地 littoral drift沿岸漂浮物 coast海岸 maintain保持 beach海滩 frailty弱点 craft工艺 indestructibility不可破坏性 implement执行outlast比…经久 durability耐久性 ingress入口 egress出口 underpin 支撑 dewater排水 hydraulic cement水硬性水泥 lime石灰dam水坝 retain保持 discharge流量 hydroelectric水电的

Geology(地质)专业英语词汇

2. GEOLOGY地质 2.1 LITHOLOGY CASSIFICATION AND DESCRIPTION ORDER 岩性分类和描述顺序 2.1.1 Rock Types 岩石类型 Sedi Sedimentry 沉积岩 clas clastic 碎屑岩 ss sandstone 砂岩 mdst mudstone 泥岩 sh shale 页岩 clyst, clst claystone 粘土岩 sd sand 砂 mSsd medium sandstone 中砂岩 fsst fine sandstone 细砂岩 bldr boulder 卵石 pbl pebble 卵石 grl gravel 砾石 cgl conglomerate 砾岩 gywk graywacke 硬砂岩 cbl cobble 大鹅卵石 ark arkose 长石砂岩 grnl granule 粒砂 brec breccic 角砾岩 bioc bioclastic 生物碎屑岩 vcrs sst very coarse sandstone 极粗砂岩 argl argillite 泥板岩 gyp gypsum 石膏 anhy anhydrite 硬石膏 slt salt 盐岩 flint-lingite 隧石 carbonate 碳酸盐岩 ls limestone 灰岩，石灰岩 dolo dolomite 白云石 dolst dolostone 白云岩

mrls marlstone 泥灰石 coq coquina 贝壳灰岩 biosp biosparte 生物亮晶灰岩 biomi biomicrite 生物微晶灰岩 clcar calcarenite 灰屑岩，钙屑灰岩 clclt calcilutite 泥屑石灰岩 micr micrite 微晶灰岩 clcrd calcirudite 砾屑石灰岩 clslt calcisilitite 粉砂屑石灰岩 grst grainstone 粒状灰岩 oolitic limestone 鲕状灰岩 Igneous Rock 火成岩 intrusive igneous 侵入岩 extrusive igneous 喷出岩 volc colcanic 火山岩 grt granite 花岗岩 dr diorite 闪长岩 grdr grano diorite 花岗闪长岩 qu dr quartz diorite 石英闪长岩 dr po diorite porphyrite 闪长玢岩 syenite 正长岩 gab, gb gabbro 辉长岩 qu po quartz porphyrite 石英玢岩 an andesite 安山岩 bas basalt 玄武岩 arag aragonite 纹石，霞石 Meta Metsmorphic rock 变质岩 phyl phyllite 千枚岩 sl slate 板岩 sch schist 片岩 mbl marble 大理岩 gne gneiss 片麻岩 qtzt quartzite 石英岩 novac novaculite致密石英岩 2.1.2 COL Color, Colour 颜色 blk black 黑色 brn brown 棕色 yel yellow 黄色 gy, gry grey 灰色

土木工程专业英语词汇(整理版)

第一部分必须掌握，第二部分尽量掌握第一部分： 1 Finite Element Method 有限单元法 2 专业英语Specialty English 3 水利工程Hydraulic Engineering 4 土木工程Civil Engineering 5 地下工程Underground Engineering 6 岩土工程Geotechnical Engineering 7 道路工程Road (Highway) Engineering 8 桥梁工程Bridge Engineering 9 隧道工程Tunnel Engineering 10 工程力学Engineering Mechanics 11 交通工程Traffic Engineering 12 港口工程Port Engineering 13 安全性safety 17木结构timber structure 18 砌体结构masonry structure 19 混凝土结构concrete structure 20 钢结构steelstructure 21 钢-混凝土复合结构steel and concrete composite structure 22 素混凝土plain concrete 23 钢筋混凝土reinforced concrete 24 钢筋rebar 25 预应力混凝土pre-stressed concrete 26 静定结构statically determinate structure 27 超静定结构statically indeterminate structure 28 桁架结构truss structure 29 空间网架结构spatial grid structure 30 近海工程offshore engineering 31 静力学statics 32运动学kinematics 33 动力学dynamics 34 简支梁simply supported beam 35 固定支座fixed bearing 36弹性力学elasticity 37 塑性力学plasticity 38 弹塑性力学elaso-plasticity 39 断裂力学fracture Mechanics 40 土力学soil mechanics 41 水力学hydraulics 42 流体力学fluid mechanics 43 固体力学solid mechanics 44 集中力concentrated force 45 压力pressure 46 静水压力hydrostatic pressure 47 均布压力uniform pressure 48 体力body force 49 重力gravity 50 线荷载line load 51 弯矩bending moment 52 torque 扭矩53 应力stress 54 应变stain 55 正应力normal stress 56 剪应力shearing stress 57 主应力principal stress 58 变形deformation 59 内力internal force 60 偏移量挠度deflection 61 settlement 沉降 62 屈曲失稳buckle 63 轴力axial force 64 允许应力allowable stress 65 疲劳分析fatigue analysis 66 梁beam 67 壳shell 68 板plate 69 桥bridge 70 桩pile 71 主动土压力active earth pressure 72 被动土压力passive earth pressure 73 承载力load-bearing capacity 74 水位water Height 75 位移displacement 76 结构力学structural mechanics 77 材料力学material mechanics 78 经纬仪altometer 79 水准仪level 80 学科discipline 81 子学科sub-discipline 82 期刊journal ,periodical 83文献literature 84 ISSN International Standard Serial Number 国际标准刊号 85 ISBN International Standard Book Number 国际标准书号 86 卷volume 87 期number 88 专着monograph 89 会议论文集Proceeding 90 学位论文thesis, dissertation 91 专利patent 92 档案档案室archive 93 国际学术会议conference 94 导师advisor 95 学位论文答辩defense of thesis 96 博士研究生doctorate student 97 研究生postgraduate 98 EI Engineering Index 工程索引 99 SCI Science Citation Index 科学引文索引 100ISTP Index to Science and Technology Proceedings 科学技术会议论文集索引 101 题目title 102 摘要abstract 103 全文full-text 104 参考文献reference 105 联络单位、所属单位affiliation 106 主题词Subject 107 关键字keyword 108 ASCE American Society of Civil Engineers 美国土木工程师协会 109 FHWA Federal Highway Administration 联邦公路总署

地质专业英语词汇大全

地质专业英语词汇A a hoｒｉzoｎ a 层位 a ｌiｎeaｔioｎ a 线理 a ｔwin ａ双晶 aａ lava 块熔岩ａａlenian ｓｔage 阿林阶ａbaｎdon 废弃 abandoned mｉne 废弃得矿山abandoｎeｄ well 废孔ａｂａtｉs 通风隔墙 abdomｅn 腹部ａｂdomｉｎａl apｐendage 腹肢abdominal cａvity 腹腔ａbdｏminal fin 腹 abｄｕctoｒ外展肌 aｂduｃｔor musｃlｅ外展肌abeｒnaｔｈyｉte 水砷钾铀矿ａbｅｒrａtｉoｎ象差 aｂichite 光线矿 abiogｅｎesis 自然发生abiogenｙ自然发生ａbioｔiｃ faｃtor 非生物因素ablatiｏn 剥蚀ａblatiｏn brｅccia 剥蚀角砾岩ablａtiｏn ｍorａiｎe 消融碛ablation skin 熔蚀皮 ablatｉｏｎtill 消融碛ablyｋite 阿布石 aｂnormａｌ异常得 abnormal inteｒfｅrｅnce colｏr 异常干涉色 abnorｍal metamorphisｍ异常变质酌 abolｉｔion 废除ａbrade 剥蚀 aｂraｓioｎ海蚀 aｂrasｉoｎｐlatｆorｍ磨蚀台地 abrasｉｏn surfａｃe 浪蚀面 abrａｓion terraｃe 磨蚀阶地 aｂraｓioｎn teｓｔ磨耗试验 abrasive 磨料；海蚀得 abrazｉte 多水高岭土 aｂｓarｏｋite 正边玄武岩 abｓitｅ钍钛铀矿 aｂsoｌｕtｅ age 绝对年龄ａｂsoluｔｅ black bodｙ绝对黑体 aｂsｏlｕｔe chronoｌoｇｙ绝对年代学 absｏluｔe dａtｉｎｇ绝对年代测定 absolｕte gｅopoｔenｔial 绝对重力势 absoluｔe porosity 绝对孔隙率 absｏlute ｐressｕre 绝对压力 absoｌutｅｓtｒuctuｒe 绝对构造ａbsoｒbeｄ waｔer 吸附水 abｓoｒbeｎｔ吸收剂 aｂsorber 吸收器 absorbing well 吸水井ａbsorption 吸收ａbsoｒption axis 吸收轴 abｓｏrptioｎｂordｅｒ融蚀缘 absorption ｃｕrve 吸收曲线ａbsorptｉon eｄgｅ吸收端 absoｒptｉon fａctor 吸收率 absoｒpｔiｏn spｅctrum 吸收光谱 abｓｏrｐtiｖe caｐaciｔｙ吸收率 aｂｓorptivｉty 吸收性ａbuｋｕmａlite 铋磷灰石 aｂundanｃｅ丰度ａｂunｄａｎｃe of elｅｍeｎts 元素丰度 abuｎｄaｎce oｆｉsｏｔopes 同位素丰度 aｂundance rａtｉo of isotopeｓ同位素相对丰度 abysｍaｌｄeｐｏsits 深海沉积物 abｙsｓ深海 aｂyssal 深海得 abysｓaｌ benｔhic zone 深渊底栖带 abｙｓsal ｄepoｓｉts 深海沉积物 abyｓsａｌｆacies 深海相 abｙsｓaｌ hills proｖiｎce 深海丘陵区

初中英语情态动词讲解

情态动词（一）情态动词的定义: 情态动词表示说话人对某一动作或状态的态度。（二）情态动词的特点 1. 情态动词有一定的词义。 2. 情态动词不能单独做谓语，它必须和其他动词的原形一起构成谓语。 3. 情态动词没有人称，数的变化。（三）情态动词的结构和意义 1.情态动词的基本句型 ?肯定句：主语+情态动词+动词原形+...... ?否定句：主语+情态动词+not+动词原形+...... ?疑问句：情态动词+主语+动词原形+...... 2. 情态动词的意义 must“必须”；can/could“能，会”；may/might “可以”；should“应该”； would“愿，要”；have to“不得不”；need“需要” （四）情态动词的基本用法 1.can (could主要指过去时间) 1）表示人或物本身所具有的能力，意为“能，能够，会” : Two eyes can see more than one. / I can swim very well. 2）表示可能（理论上或是逻辑判断上） He can’t (couldn’t) have enough money for a new car. 3）表示允许： Can I have a look at your new pen? He asked whether he could take the book out of the reading-room. 4）表示对现在动作或状态的猜测，主要用于否定句和疑问句中或感叹句中: He can’t (couldn’t) be over sixty.他不可能超过六十岁。 5）could表示比can更委婉客气的提出问题或陈述看法，指的是现在时间。 Can (Could) you lend me a hand? 帮我一把好吗？ 2. may (might) 1）表允许，询问或说明一件事可不可以做，might指过去时间；但在疑问句中might也可指现在时间，语气比may更委婉。 May (Might) I ask for a photo of your baby? 我可以要一张你宝宝的照片吗？在回答以may引起的问句时，肯定回答是一般可仍用may,或Yes, please. / Certainly./Sure./Of course. ；否定回答根据说话人的语气由强到弱分别选用: must not(mustn’t)（禁止）/ had better not（最好别）/ may not（不行） 2) may表可能,但所表示的可能性不如can所表示的那样肯定。might可以指过去时间，也可以指现在时间，但语气更加不肯定。 He may be at home. 他可能在家。 They might be having a meeting, but I’m not sure.他们有可能在开会，不过我不肯定。 3. must（have to表示客观需要） 1）表示“必须”（主观看法）时，用于肯定句或疑问句；用于否定句时表示“禁止”。 We must do everything step by step. 我们一切都必须循序渐进地做。 You must get home before 9:00. 2）表示揣测。意为“想必、准是、一定”等，只用于肯定句。 He must be ill. He looks so pale. 他准是病了。他的脸色苍白。 3)must的疑问句，肯定回答用must，否定回答用needn’t或don’t have to。 4. should 1）表责任或义务，意为“应该”，用于各种人称。

石油地质学常用专业英语词汇.

abbreviate v.缩写，简写abno rmally ad.异常地 abrupt v. 突然的 absolute porosity绝对孔隙度access n接近，进入accumulate v.聚集accumulation n.聚集acquisition n.获取，采集acromagnetic a.航空磁测的acyclic a.无环的 admixture n.混合,混合物aeolian a.风成的,风积的aerobic a.喜氧的 affinity n. 亲合力,亲合性 aformentioned a.上述的，上面提到的agency n.因素，营力，作用agglomeration n. 结块，凝聚aggregated gas R集型气 agitated a.搅动过摇过的 agitation n. 搅拌,搅动 aircraft n. 飞机,航空器 algae藻类 aliphatic a. 脂肪类的 alkane 链烷 alka ne n.烷烃，链烷 alke ne n.烯烃 alkylaromatic a. 烷基芳烃的 alkylate v. 烷基化

allochthonous a.外来的，异地的 alluvial fan 冲积扇 alteration n. 蚀变作用 ambie nt a.周围的 ambiguity n.含糊，模棱两可ambiguous a.意思含糊的，模棱两可的ami no acids 氨基酸 ammonite n. 菊石 amorphous a.非晶质的，无一定方向的amphibolite n.角闪石 amplitude n. 幅度,振幅 analogous a类似的，模拟的 angular a.棱角状的，带角的anhydrite n.硬石膏 anomoly n. 异常,变异 anoxic a. 缺氧的 an teisoalka ne n.反异构烷烃 an thracite n.无烟煤 anticline n. 背斜 antiform n. 背斜构造 aperture n 孔，孔眼 apparent molecular weight表观分子量aquatic a.水的,水生的 arago nite n霰石

土木工程专业英语词汇汇总

A Type Wooden Ladder A字木梯 A-frame A型骨架 A-truss A型构架 Abandon 废弃 Abandoned well 废井 Aberration of needle 磁针偏差Abnormal pressure 异常压力abnormally high pressure 异常高压Abort 中止 abrasion 磨损 Abrasion surface 浪蚀面 abrasive cut-off machine 磨切机Abrasive Cutting Wheel 拮碟abrasive grinding machine 研磨机Abrasive Grinding Wheel 磨碟abrasive particle 磨料颗粒 Absolute address 绝对地址Absolute altitude 绝对高度Absolute damping 绝对阻尼Absolute deviation 绝对偏差Absolute flying height 绝对航高Absolute gravity 绝对重力 absolute permeability 绝对渗透率absolute porosity 绝对孔隙率absolute temperature 绝对温度absorbability 吸收性；吸附性absorption 吸收 abutment 桥墩 abutting end 邻接端 acceleration 加速 acceleration lane 加速车道Acceleration of gravity 重力加速度acceleration pedal 加速器踏板accelerator 催凝剂；加速器；催化剂acceptance criteria 接受准则 access 通路；通道 access door 检修门；通道门access lane 进出路径 access panel 检修门 access point 入口处；出入通道处access ramp 入口坡道；斜通道access road 通路；通道 access shaft 竖井通道 access spiral loop 螺旋式回旋通道access staircase 通道楼梯 access step 出入口踏步 access tunnel 隧道通道 accessible roof 可到达的屋顶accessory 附件；配件accident 事故；意外 accidental collapse 意外坍塌 accommodate 装设；容纳 accredited private laboratory 认可的私人实验室 accumulator 储压器；蓄电池 accuracy limit 精度限制 acetylene cylinder 乙炔圆筒 Acetylene Hose 煤喉 Acetylene Regulator 煤表 acid plant 酸洗设备；酸洗机 acid pump 酸液泵 acid tank 酸液缸 acidic rock 酸性岩 acoustic couplant 声耦合剂 acoustic coupler 声音藕合器；音效藕合器 acoustic lining 隔音板 acoustic screen 隔声屏 Acoustic wave 声波 acrylic paint 丙烯漆料(压克力的油漆) acrylic sheet 丙烯胶片(压克力的胶片) active corrosion 活性腐蚀 active earth pressure 主动土压力 active fault 活断层 active oxidation 活性氧化 actual plot ratio 实际地积比率 actuator 促动器；唧筒；激发器 adapt 改装 adaptor 适配器；承接器；转接器； addition 增设；加建 additional building works 增补建筑工程 additional horizontal force 额外横向力 additional plan 增补图则(附加的平面图) additional vent 加设通风口 additive 添加剂 Address 地址 adhesive 黏结剂；胶黏剂 adhesive force 附着力 Adhesive Glue 万能胶 Adhesive Reflective Warning Tape 反光警告贴纸 adit 入口；通路；坑道口 adjacent construction 相邻建造物 adjacent level 相邻水平 adjacent site 相邻基地 adjacent street 相邻街道 adjoining area 毗邻地区 adjoining building 毗邻建筑物 adjoining land 毗邻土地 adjoining structure 毗邻构筑物 adjustable 可调校 Adjustable Wrench Spanner 昔士 adjuster 调节器 adjustment 调校；调整 Administrative Lawsuit 行政诉讼 Administrative Remedy 行政救济 admixture 掺合剂；外加剂 advance directional sign 前置指路标志；方向预告标志 advance earthworks 前期土方工程 advance warning sign 前置警告标志 advance works 前期工程 aeration 曝气 aeration tank 曝气池 aerial 天线 Aerial mapping 航空测图 aerial photograph 航测照片 Aerial photography 航照定位 aerial rapid transit system 高架快速运输系统 aerial ropeway 高架缆车系统 aerial view 鸟瞰图 aerofoil 翼型 aerosol 悬浮微粒；喷雾 aerosphere 大气圈 affix 贴附 aftercooler 后冷却器 afterfilter 后过滤器 aftershock 余震 agent 作用剂；代理人 aggradation 堆积 aggregate 骨材；集料；碎石 aggregate area 总面积 aggregate grading 骨材级配 aggregate superficial area 表面总面积 aggregate usable floor space 总楼地板空间 agitator 搅拌器；搅动机 air bleeding 放气(空气渗出) air blower 鼓风机 air brake 气压制动器 Air chambor 气室 air circuit 空气回路 air circuit breaker 空气断路器 air cleaner 空气滤清器

地质专业英语电子版

The Earth From classical times it has been known that the earth is roughly spherical in shape. Actually the planet is shaped more like a slightly flattened ball whose polar radius is about 21km shorter than its equatorial radius. The average radius is 6371km. The earth’s specific gravity is 5.5. It is 5.5 times as heavy as an equal volume of water. The specific gravity is greater than that of any other planet in the solar system, but not appreciably different from that of Mercury, Venus and Mars. Because the average specific gravity of surface rocks is only about 2.7, the material existing deep within the earth must have a specific gravity well in excess of the 5.5 average. Very likely, the material at the earth’s center has a specific gravity as high as about 15. The splendid photographs of the earth taken from space by Apollo astronauts remind us that our planet is more than a rocky globe orbiting the sun. The patterns of white clouds above the azure blue color tell us of the presence of an atmosphere and hydrosphere. Here and there one can even discern patches of tan that indicates the existence of continents. Greenish hues provide evidence of the planet’s most remarkable feature: there is life on earth. THE A TMOSPHERE We live beneath a thin but vital envelope of gases called atmosphere. We refer to these gases as air. “Pure air”is composed mainly of nitrogen (78.03%) and oxygen 920.99%). The remaining 0.98% of air is made of argon, carbon dioxide and minute quantities of other gases. One of these “other”components found mostly in the upper atmosphere is a form of oxygen called ozone. Ozone absorbs much of the sun’s lethal ultraviolet radiation, and is thus of critical importance organisms on the surface of the earth. Air also contains from 0.1 percent to 5.0 percent of water vapor. However, because this moisture content is so variable, it is not usually included in lists of atmospheric components. Every day, the atmosphere receives radiation from the sun. This solar radiation provides the energy that heats the atmosphere and drives the winds. Distribution of solar radiation is one of the most important factors in determining the various kinds of climate we experience on the earth. THE HYDROSPHERE（水圈） The discontinuous envelope of water that covers 71 percent of earth’s surface is called hydrosphere. It includes the ocean as well as water vapor. The water contained in streams and lakes, water frozen in glaciers, and water that occurs underground in the pores and cavities of rocks. If surface irregularities such as continents and deep oceanic basins and trenches were smoothed out, water would completely cover the earth to a depth of more than two kilometers. Water is an exceedingly important geologic agent. Glacier composed of water in its solid form alter the shape of the land by scouring, transporting and depositing rock debris. Because water has the property of dissolving many natural compounds, it contributes significantly to the decomposition of rocks and, therefore, to the development of soils on which we depend for food. Water moving relentlessly down hill as sheetwash, in rills, and in streams loosens and carries away the particles of rock to lower elevations where they are deposited as layers of sediment. Clearly, the process of sculpturing our landscapes is primarily dependent upon water. By far the greatest part of the hydrosphere is contained within the ocean basins. These basins are of enormous interest to geologists who have discovered that they are not permanent and immobile as once believed, but rather are dynamic and ever changing. There is ample evidence