Keep a pad handy to jot down queries as they occur.手边放一本便笺簿，以便有问题时随时记下。To make it easier to contact us, keep this card handy.把这张卡放在手边，以便于和我们联系。That key will come in handy if you lock yourself out.要是你把自己锁在了屋外，那把钥匙就派上用场了。...
表明笔石详细构造的物质是利用氢氟酸从石灰岩中侵蚀出来.Material illustrating detailed structure of graptolites has been etched from limestone by means of hydrofluoric acid.从而为笔石反射率的正确测定和取值奠定了基础.These provide base for the correct measurement and val...
Emergency workers fear that the burning ship could slip its moorings.急救人员担心燃烧着的船只可能会脱链滑走。They escaped through an emergency exit and called the police.他们从紧急出口逃脱，并报了警。The Prime Minister has called an emergency meeting of p...
The creating course of chlorine water and the vacuum dechlorination process was briefly introduced.简要介绍了氯水产生的过程及真空脱氯工艺.The main way for the reductive dechlorination of chloralkane is the direct transfer of electron.电子直接转...