2）履行，实行；完成；履行

　perform an experiment/operation 做实验/手术

　perform one's duty/promise履行职责/诺言

　The students are performing an experiment. 学生们正在做一个实验。

　He is sure to perform his promise. 他肯定会履行诺言。

3）（机器等）运转

　The engine seems to be performing well. 发动机似乎运转正常。

　performance n．表演；表现；性能；执行；履行

　give a performance 演出

　put on performances 演出

　They will give a performance/put on performances at the theater.

　他们将在那家剧院演出。

　performer n．表演者

2. advantage [C；U] 优势，优点，长处，有利条件

disadvantage n．(反义词)不利条件

1)take advantage of对......加以利用；乘机利用

take (full) advantage of

　make full use of

　make the best of

2) win/have/get/gain an/the advantage over/of 胜过；优于

(P42)...and they had a major advantage over their better-known rivals---they were cheaper.

3) to one's advantage 对某人有利

4) be of advantage to 对......有利

　Take advantage of class time，or you will miss most of what the teacher says.

　利用好课堂上的时间，要不然你会错过老师讲的内容。

Her teaching experience gave her a big advantage over the other applicants for the job. 她的教学经历使她比起其他求职者具有更大的优势。

　Yao Ming has an advantage over other players in playing basketball.

　姚明在打篮球方面比其他选手更有优势。

　The type of cellphone has a big advantage over that one.

　这款手机比那款手机有更大的优势。

　It would be to your advantage to prepare questions in advance.

　事先把问题准备好肯定会对你有利。

3. guarantee

(P42) The success for Li Ning was guaranteed, and it came quickly.