大学英语四第一单元课后3,5,7答案及翻译(6)

4.Biology teachers often make an analogy between the heart and a pump in order to help students understand how the heart works.
生物学老师经常把心脏和泵作类比,以帮助学生理解心脏是如何工作的。
5.They would like to set a date for their wedding and announce their engagement to their families and friends as soon as possible.
他们想为他们的婚礼定一个日期， 并尽快向他们的家人和朋友宣布订婚。
6.He was determined not to sour a perfectly good day with the memory of one jealous classmate trying to make a fool out of him in front of the entire class.（使...变成...）
他决心不让一天过得非常愉快， 因为他想起了一个嫉妒的同学在全班同学面前试图愚弄他。
7.The couple made a pact never to work at the same time,so that one of them was always on full-time parenting duty,and their child wouldn’t have to be looked after by strangers.
这对夫妇约定永远不要同时工作， 所以他们中的一个总是全职做父母， 他们的孩子不必被陌生人照顾。
8.The president said that it"s the worst earthquake ever to hit the country,and that he had appealed to the world for help, asking in particular for heavy-lift helicopters able to carry relief
supplies into the isolated mountain areas.