碳酸二甲酯 聚氯乙烯 变压吸附chlorobromomethane 氯溴甲烷）hexachtorocyclohexane 六氯环己烷;六六六） hydrodesutfurization （加氢脱硫）polytetrafluoroethylene （聚四氟乙烯）DMC 一 Di-methyl carbonate PVC — Polyvinyl chloridePSA - Pressure-swing absorbing溶胶凝胶Sol-gel 密度density燃料电池The fuel cell 清洁能源clean energy纟内米棒Nano stavecurre nt 流通一电流 coat:外套一镀层body :身体一机身 hand 手一手柄、指针 cock 公鸡一旋塞 cap 帽子一轴承盖Alcohol:高度酒，酒精一醇 Impregnation:怀孕 -- 浸渍 Extract:榨取、摘录一萃取U-tube ： U 型管; I-bar ：工字铁;O-ring : O 形环 T-square ： 丁字尺阪r 或希 烷疑aae烷基、I alkyl烯妊tncAlkrnc缺婭ync JilkyntSf otakobolS 11 aldehydeonemono- methanemetin'! ■ -nieth«iioJmetbyI aldehydetwodi-； bi-ethaucethylethene, ethvlenectbynr; acefrlene ■Fethjnol;ilcohalet hu l .aldehvde■ » three Iri- propinepropene|）ru|iyD* ptU|JJLIJUl prvpylMldebyd^fourtetra- quadri-butanebnt\lbutenebutynebuunoJ bntyl aldehydefjvfprut fa ）- ppnuiirpmty] prnteneprnti'nep^nt^nnl p^nlanalh 芒戢釘-hera n«beicyL h 吏工电n 电hejiyneh^xinolhex anal5 ETCH hcptCa ）- heptaneheptyl heptene heptiac heptanol heplanaJ 呃hrtoti [町-OCldtieoct\ Locteueactyneoclanoluch 1 dldehx denin<nonanenonylnonenenonynenonunolnonyl 4 J ckin-deleu deefa ）-dvciue[dreeuedvet ue■fdet aiivl1 jlikli% JeOur first electro nic computers were made in 1958我国首批电子计算机是1958 年制成的。
Coal, petroleum and n atural gas now yield their bond en ergies to mar煤，石油和天然气现在为人类提供各种各样的结合能。
Properties of non-metals vary widely 非金属的性质差异很大。
Salts may also be found by the replacement of hydrogen from an acid with a metal.盐也能通过用金属置换酸中的氢而获得。
An acid was once defi ned as a substa nee that would form hydroge n ion s(H+) in water solution and a base as one that would form hydroxide ions(OH-) in the sam人们曾把酸定义为在水溶液中能产生氢离子的物质，而碱则是在同样溶液中会产生氢氧根离子的物质。
Automati on helps to in crease productivity hun dreds of times over自动化使生产率提高了几百倍。
Million billion billion atoms. 10 6x 109x 109也就是1024个原子(美语)Half of a millionth of a billionth of billionth of a pound. 0.5 10-30磅(10-6x 10-12x x 10-12)(英语)Other things being equal, copper heats up faster tha n iron相目同条件下，铜比铁热得快。
Steel a nd cast iron also differ in carbon l冈和铸铁的含碳量也不相同。
America ns every year swallow 15000 tons of aspiri n, one of the safest and most effective drugs inven ted by ma n.阿司匹林是人类发明的最安全，最有效的药物，美国每年要消耗15000吨。
Alloys bel ongs to a half-way house betwee n mixture and compo un ds.合金是介于混合物和化合物之间的一种中间结构。
In dustrializati on and en vir onmen tal degradati on seem to go hand in han工业化发展似乎伴随着环境的退化。
Different metals differ in their conductivity.不同金属具有不同的导电性能。
(承前省略) When the solution in the tank has reached the desired temperature, it is discharged 当罐内溶液达到所要求的温度时，就卸料。
There are some metals which are lighter tha n wate有些金属比水轻。
Whe n short waves are sent out and meet an obstacle, they are reflect短d波发射出后，遇到障碍就反射回来。
Friction always opposes the moti on whatever its direct ion may be^ 管运动方向怎样，摩擦总是同运动方向相反。
Then, came the development of the microcomputer后来，微型计算机发展起来了。
Evide ntly，semic on ductors have a less con duct ing capacity tha n met显然，半导体的导电能力比金属差。
In the transmission of electric power; a high voltage is necessary远距离输电必须咼电压。
Most substa nee expa nd on heat ing and contract on cooli n多数物质热胀冷缩。
Extreme temperature causes dramatic cha nges in the properties of rubb橡胶处于极限温度时，其性能会发生惊人的变化。
Evaporati on sometimes produces a slurry of crystals in a saturated mother liquor. 有时蒸发能在饱和的母液内产生晶浆。
Orga nic compo unds were once thought to be produced only by liv ing orga ni sm. 以前曾认为有机化合物只能从有生命的机体中产生。
The publication of Chemical Engineering was stopped during World War II, and the bla nks were later filled.《化学工程》在第二次世界大战期间曾停刊过，不过随后又填补了以前的空白。
Eve n before the Second Five-year pla ne, China was already produc ing all kinds of lathes, machi nes, apparatus and in strume n甚至在第二个五年计戈U之前，中国就已经在生产着各种车床、机器、仪器和设备。
The carb on had lost electr ons and the oxyge n has gained electr ons in the cha nge. 在变化中，碳失去了电子，而氧获得了电子。
It was reported that scientist had worked at the problem of storing the sun ' s heat for many years据报道，对于贮藏太阳能的问题，科学工作者曾经进行过多年的研究。
The mechanical energy can be changed back into electrical energy through a gen erator发电机可以把机械能再转变为电能。
Oxidati on will make iron and steel rust y 氧化作用会使钢铁生锈。
The principles of absorption and desorption are basically the same.吸收和解吸这两个过程的原理基本相同。
Ketones are very closely ralated to both aldehydes and alcohols.酮与醛和醇的关系都很密切。
The project is the largest public works program un dertake n by a state in the history of the Un ited States.这是美国历史上由一个州单独承担的最大的一项公共工程。
Transistors are sma, efficient and have a long life.晶体管体积小、效率高、寿命长。
