since: conj.因为;既然;自从
例句搭配:
He must have taken the book since it isn't here.
他一定是把书拿走了,因为书已不在这里了。
Since you can't answer the question, perhaps we'd better ask someone else.
既然你无法回答这个问题,我们最好再问问别人。
have a chance to: 有机会做
last: v.持续;维持
例句搭配:
The hot weather lasted until September.
炎热的天气持续到九月。
The wind is changing round, so the storm won't last long.
风正在转向,因此暴风雨不会持续太长的时间。
preserve: v.保护;保存;保持
例句搭配:
It is highly important to preserve the environment.
保护自然环境至关重要。
It's the duty of the police to preserve the public order.
维护公共秩序是警察的职责。
one percent: 百分之一
solution: 溶液
polyvinyl: 乙烯聚合物的 (无臭,无毒,手感似蜡,具有优良的耐低温性能,化学稳定性好,能耐大多数酸碱的侵蚀。常温下不溶于一般溶剂,吸水性小,电绝缘性能优良。)
acetal: 乙缩醛 (乙缩醛,危险化学品。主要用作溶剂,以及用于有机合成和化妆品、香料的制造。人体吸入、口服或经皮吸收,对机体可能产生危害。具有刺激性。另外,对于环境亦有一定危害。)
resin: 树脂,松香
snowflake: 雪花
词汇搭配:
snowflake transistor雪片形晶体管
snowflake cataract[医] 雪花状内障)
process: n.工序;过程
例句搭配:
Building a car is a long process.
制造一辆小汽车有很长的工序。
They went over every process again, but without result.
他们把每道工序又检查了一遍,却仍没有结果。
catch a break: 小憩一会;意外的好运
alert: n.警戒;警报(用来引起别人注意)
例句搭配:
Troops are on the alert against any possible aggression.
军队戒备着可能的来犯。
One should not run about aimlessly during an alert.
空袭警报期间不可到处乱跑。
run away: 逃脱;离家
hand in: 提交
resignation: n.辞职;辞呈;顺从
例句搭配:
Her resignation caused much public debate.
她辞职一事引起群众议论纷纷。
His resignation is a measure of how angry he is.
从他辞职一事可见其气愤的程度。
n. 进攻,侵犯,侵害,侵略