— no better or no worse than others.

　　— 符合一般水平

　　Example： Some staff's performance is about average. They have never proved better.

　　（2） About time

　　— the appropriate time.

　　— 差不多到时候了

　　Example： You have been working for quite a while. It's about time you had a new car.

　　（3） About to

　　— ready to

　　— 即将；正要

　　Example： We were about to go out when it suddenly rained.

　　（4） Back to back

　　— with the back facing the other.

　　— 背靠背

　　Example： Stand back to back, boys！ Let me see who is the tallest.

　　（5） Back to front

　　— with the back placed where the front should be.

　　— 前后颠倒

　　Example： You got your pullover on back to front.

　　— thoroughly

　　— 透彻地

　　Example： All the people here know the government's major policies back to front.

　　（6） Back up someone/something

　　— support someone/something.

　　— 支持某人／某事

　　Example： ① No matter how, we should back up our most respected representative.

　　② Some new evidence backed up the prosecutor's argument.

　　（7） Call on/upon someone

　　— visit someone

　　— 访问某人

　　Example： When are we going to call on our new neighbours？

　　（8） Call on/upon someone to do something

　　— invite someone to speak, etc.

　　— 邀请

　　Example： Without further ado, let me call upon our distinguished guest to speak to us.

　　— appeal to someone to act.

　　— 恳求；促使

　　Example： In times of difficulties, we will have to call on the public to make donations.

　　（9） Call out someone

　　— order officially.

　　— 召唤

　　Example： During the riot, the chief of police had to call out the riot police to restore law and order.

　　（10） Damp（en） something down

　　— make a fire burn less strongly.

　　— 使火燃烧缓慢下来

　　Example： It was a moonlit night, so the campers dampened down the fire.

　　— control and reduce something； suppress something.

　　— 抑制；减弱

　　Example： ① Some boys were over-zealous and we had to damp down their enthusiasm.

　　② Lack of support has damped down political dissidents' activities.

　　（11） Dance attendance on/upon someone

　　— do what someone wants without asking.

　　— 侍候某人，听其差遣

　　Example： The manageress sat still, expecting everyone to dance attendance on her.

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