风险不可能完全消除，但可以通过防范和培训来降低。You could never eliminate risk, but preparation and training could attenuate it.必须采取防范措施阻止偷盗行为。Precautions had to be taken to prevent pilfering.警方及时采取防范措施，避免了可能发生的骚乱。The police were able to take p...
China boasts the world's earliest observatory, built in Nanking in 1385 in the Ming Dynasty ( 1368 A . D . - 1644 A . D . ), three centuries ahead of the Greenwich Observatory built in Britain in 1670.中国建有世界上最早的气象台....
Several long-awaited videos will finally arrive in the shops this month.几部让人翘首企盼的录像片终于将在这个月到货。He was still twitchy and we awaited Ann's return anxiously.他仍然焦虑不安，我们担心地等着安回来。For many, their long-awaited homecoming was...
I often doodle when I'm on the phone.我打电话时常常信手乱画。This made him look like a doodlebug, so I began calling him'Doodle.这使他看上去像一只幼虫, 所以我开始叫他 “ 嘟嘟”.We sang these lines to the tune of Yankee Doodle.我们用扬基歌的曲调唱这几句歌词." ...
Starch subjected to dry heat is changed to dextrine ( C 6 H 10 O 5 ), British gum.淀粉一受干热会变成浆糊 ( C6H10O5 ), 也叫英国浆糊.Starch degradation and then become a dextrine.淀粉降解之后就成为糊精.Dextrine subjected to heat plus an acid or a fer...