aquation，hydration，hydratization，hydratation ；
[例句] 水合质子作为一种离子包括在计算中. The hydrated proton has been included in the calculations as one ion.
[例句] 如果以水作溶剂, 它便称为水合. If water is the solvent, it is called hydration.
hydraulic pressure ；
[例句] 随着液压系统嘎吱一声响，起落架进入了锁定位置。 There was a whine of hydraulics as the undercarriage locked into position.
[例句] 是机器下面的液压千斤顶造成的移动. Hydraulic jacks under the machine produce the movement.
[化] hydrogenation，hydrogenate，hydriding，hydrogasification，hydrogen sulfide ；
[例句] 商业上采用的以镍作催化剂的氢化有两种. Commercially two main types of hydrogenations are carried out with Nickel catalyst.
[例句] 抑制剂和促进剂能影响氢化速率. Inhibitors and promoters may affect the rate of oxxidution.
be open to navigation or air traffic ；
[例句] 运河可以通航了。 The canal is open to shipping.
[例句] 这两个城市间已有轮船通航. Steam navigation has been opened up between the two cities.
形 luxurious，extravagant，excessive，inordinate ；
[例句] 我已有了前车之鉴,对于胜利,千万别指望过奢. I had learned that victories did not count for much.
[例句] 埃莉诺细细领会每一句叫她不抱信心的暗示, 同样告诫自己不要作过奢的指望. Elinor, conning over every injunction of distrust, told herself likewise not to hope.
air admission，admission，inlet，onflow ；
[例句] 在圆形活塞的VV化油器中, 活塞是由进气歧管真空移动的. In the roundpiston VV carburetor, the piston is moved by intake - manifold vacuum.
[例句] 这个真空叫做进气歧管真空.这种进气歧管真空随运转情况而变化. This vacuum, called intake - manifold vacuum, varies as the operating conditions change.
constant，invariablenes ；
[例句] 工作时周围环境温度恒定有多么重要呢？ How important is it to have an even temperature when you're working?
[例句] 温度通过热传导变得一致，直到最终达到恒定状态。 Temperature becomes uniform by heat conduction until finally a permanent state is reached.
名 [书]fine jade，a surname ；
[例句] 我再次尝试联系我的表妹琼。 I tried again to get ahold of my cousin Joan.
[例句] 这个话题最能让琼斯唠叨个没完。 Jones harps on this theme more than on any other.
key，unlocking key，[电影]Kelid；
[例句] 我被开除后，就拿了这些钥匙作为纪念。 When I got canned, I took these keys as souvenirs.
[例句] 他是不是拿过车钥匙，开着她的车子玩儿？ Had he taken the keys and played around with her car?
lactic acid，lactate，lact-，lacti- ；
[例句] 这种微酸的味道是因为含有乳酸造成的。 The somewhat acid flavour is caused by the presence of lactic acid.
[例句] 乳酸是一种具有重要工业价值的有机酸。 Lactic acid is an important organic acid of industrial importance.
[地] latitude，lat. ；
[例句] 该岛的纬度是南纬20度. The latitude of the island is 20 degrees south.
[例句] 在这一纬度地区经常有大风. At this latitude you often get strong winds.
legality，legal institutions，legal system ；
[例句] 我也在急切地关注我们该如何加强法制。 I am also looking urgently at how we can strengthen the law.
[例句] 警察设法制住了那个囚犯的反抗. The police tried to break down the prisoner's opposition.
名 （早晨） morning ；
[例句] 他起床后穿上了晨衣。 He got out of bed and pulled on his bathrobe.
[例句] 她从床上蹑手蹑脚地爬起来，摸索着自己的晨衣。 She crept from the bed and fumbled for her dressing gown.
engage in archaeological studies，archaeology ；
[例句] 外国的考古学者们联翩而至. Foreign archaeologists are arriving one after another.
[例句] 他是位考古学家，过去的一年都在参与克里特岛上的一项考古发掘工作。 He's an archaeologist and has been on a dig in Crete for the past year.
thin film，film，diaphragm，membrane，pellicle ；
[例句] 他们在我们的窗子里面贴了层塑料薄膜。 They put plastic sheeting on the insides of our windows.
[例句] 秧苗上面覆盖着塑料薄膜. The rice seedlings were covered with plastic sheeting.
north，the northern part of the country，the North，boreal，northward；
[例句] 3星级宾馆的住宿价格在几个北方城市降得最多。 Prices at three-star hotels fell furthest in several northern cities.
[例句] 北方的军队现在随时都可能大批越过新边界。 Any day now, the Northern forces may pour across the new border.
形 [书] （旺盛） vigorous，exuberant；副 （突然） suddenly；名 （姓氏） a surname ；
[例句] 鲍勃死于由他的生活方式引起的心脏病突发。 Bob died of a heart attack, brought on by his lifestyle.
[例句] 鲍勃从椅子上滑下来，趴在了地板上。 Bob slid from his chair and lay prone on the floor.
go through，pass through，current，general，traffic ；
[例句] 许多小河的水已经漫过堤岸，造成一些道路不能通行。 Many streams have flooded their banks, making some roads impassable.
[例句] 通往该岛的堤道只有在枯潮时才能通行。 The causeway to the island is only accessible at low tide.
purchase，select and purchase，make purchases for an organization or enterprise；
[例句] 当然了，倘若价格合适，我们将采购你们的全部产品。 We'll buy everything you produce, provided of course the price is right.
[例句] 街上挤满了为圣诞节采购的人。 The streets were full of Christmas shoppers.
weeding，weed control，extirpate weed，weed out (weeds)，weed ；
[例句] 除草剪刀；专门用于修剪缝隙角落里的青草。 Grass shears are specially made to trim grass growing in awkward places.
[例句] 他们把他的除草机全都推到外面丢掉了。 They trundled his mowers outside and dumped them.