(2)从属连词

　　②While (＝ Though/Although) the students came from different countries, they got along quite well in the summer camp.

　　尽管学生们来自不同的国家，可是他们在夏令营相处的很好。

　　③As John Lennon once said, life is what happens to you while (＝ when) you are busy making other plans.

　　正如约翰·列侬所言，生活就是当你在忙于其他计划时所发生在你身上的事情。

　　3．It is a difficult task to undertake. (P11)

　　这是一项很难完成的任务。

　　★undertake (undertook; undertaken) vt.着手；从事；承担；许诺

　　①The company has announced that it will undertake a full investigation into the accident.

　　公司已经宣布将对这次事故进行全面调查。

　　undertake to do sth. 答应/同意做某事　　

　　undertake responsibility/a task /a project

　　 承担责任/任务/工程

　　undertake that ... 保证/承诺......

　　②He undertook to pay (pay) the money back in six months.

　　他保证6个月内还钱。

　　③To tell the truth, I can't undertake that you will win in the election.

　　说实话，我不能保证你在选举中会胜出。

　　4．But at last the determination and patience of the scientists paid off in 1996 with a breakthrough - the cloning of Dolly the sheep. (P11)

　　但是决心和耐心使科学家们最终于1996年收获了突破性的结果--克隆羊"多莉"。

　　★pay off 得到好结果；取得成功；偿清

　　①In my opinion, cloning will pay off sooner or later on condition that we undertake to use it properly.

　　依我看，克隆迟早会有回报，只要我们保证合理应用它。

　　②What made him happy was that after all these years he at last paid off all his debts.

　　使他高兴的是多年之后他终于还清了所有的债务。

　　[点津]　pay off表示"得到回报"时，是不及物动词短语，无被动语态，且一般用表示事物的名词作主语；表示"偿清"时，是及物动词短语，可用于被动语态。

　　pay for sth.　　 付某物的钱；为某事物付出代价

　　pay sb. for sth. 因某事物给某人报酬

　　pay back 偿还(欠款)；报答；报复

　　③He had to work part­time so as to pay for his education.

　　他必须做兼职工作来支付学费。

　　④How can we pay you back for your great help?

　　我们怎么才能报答你的恩惠呢？

　　5．Then came the disturbing news that Dolly had become seriously ill.(P11)

　　接着传来了多莉病重的坏消息。

　　★主句中时间状语then放到了句首，句子使用了完全倒装结构。完全倒装的常见情况：

　　(1)out, in, into, down, up, away, here, now, then, there等表示方位和时间的副词和表示地点的介词短语置于句首，且主语是名词时，句子用完全倒装。

　　①For a moment nothing happened. Then came voices all shouting together.

　　有一段时间什么也没发生，然后传来了大家的喊叫声。

　　②Into the dark apartment walked David, who was quite surprised when everyone shouted Happy Birthday.

大卫走进了黑暗的房间，当大家喊生日快乐时，他感到很惊讶。