他们都因这条令人不安的消息而深感不安，也就是说，这条消息使他们都感到不安。

　　3．(教材P10)Yuan Longping searched for a way to increase rice harvests without expanding the area of the fields.

　　袁隆平要在不增加土地面积的基础上寻求达到增加稻谷产量的途径。

　　expand vt.& vi.使变大；伸展

　　(1)expand ... into ...　 把......扩展/发展成......

　　expand into ... 发展成/扩大成......

　　expand on sth. 细说(阐述)某事

　　(2)expansion n. 扩大；扩张；扩展

　　①The narrow path in the village expanded into a wide road.

　　村里的狭窄小路拓宽成了一条大道。

　　②The writer expanded his short novel into a long one.

　　那位作者把他的短篇小说扩展成了长篇。

　　③He did not expand greatly on his statement.

　　他未就他的声明多加解释。

　　④The book is an expansion (expand) of a series of lectures given last year.

　　这本书是去年举行的系列讲座的扩充。

　　[名师点津]　注意expand和extend的区别。前者指向四面八方的扩大、扩张，后者指向某一方向的延伸。

　　4．(教材P10)Thanks to his research, the UN has more tools in the battle to rid the world of hunger.

　　由于他的研究，联合国在消除世界饥饿的战斗中有了更多的方法。

　　thanks to 幸亏；由于；因为

　　①Thanks to your timely help, I managed to finish the work on time.

　　多亏了你及时的帮助，我按时完成了工作。

　　②Thanks to the bad weather, the match has been cancelled.

　　因为糟糕的天气，比赛被取消了。

　　[联想发散]　表示"因为；由于"的短语还有：owing to, due to, because of, as a result of, on account of等。

　　rid ...of使......摆脱或除去

　　be rid of　　　　　　　 摆脱

get rid of 摆脱；除掉；去掉