[摘要]
· have many irons in the fire同时有很多要紧的事要做

Although he was out of job, he still wrote to his parents saying he had many irons in the fire.

· be in a jam陷入困境
get in a jam

· have many irons in the fire同时有很多要紧的事要做

Although he was out of job, he still wrote to his parents saying he had many irons in the fire.

· be in a jam陷入困境
get in a jam

You’ve got to help me. I’m in a jam. May car refused to work on my way to office.

· jaywalk横穿马路

It is dangerous to jaywalk.

· in a jiffy不大一会儿
=in a moment, right away. at once

I’ll be with you in a jiffy.

· have ( a case of ) the jitters忐忑不安

The new teacher had a case of jitters when he first stood in front of the class.

· keep up with the Joneses与别人比阔，与别人攀比

He likes keeping up with the Joneses.

· get a kick out of doing something从……得到很大的乐趣

He gets a kick put of racing.

· take kindly to something/someone愿意接受

Don’t you feel that people in the lab don’t take kindly to a nosy reporter?

· kill someone with kindness好得让人受不了

The old lady almost killed me with kindness when I lived at her home.

· parade one’s knowledge买弄学问

He is a well-learned man, bit he never parades his knowledge.

· be at large逍遥法外（也可以形容动物不受约束）

The murderer was still at large. The victim’s parents was determined to find enough evidence to sue him to court.

· rest on one’s laurels故步自封，吃老本

You are sure to be lagged behind if you rest on your laurels.

· turn over a new leaf洗心革面

The juvenile delinquent promised that he would turn over a new leaf if he could be given lenient punishment.

· have a hollow leg（喝酒）海量

The best man has a hollow leg. He drinks a lot instead of the bridegroom.

· pull someone’s leg开某人的玩笑

Never ever pull his leg. He is a man without a sense of humor. He takes everything seriously.

· keep someone at arm’s length与某人保持距离

My boss is my uncle. In order to avoid unnecessary misunderstanding, I’d better keep him at arm’s length in company.

· let someone down使某人失望

Joe really let me down by having broken his promises for several times.

· can’t for the life of one怎么……也不行

I thought I could recite my speech backwards, but when I stood in front of the audience, I couldn’t for the life of me remember what to say.

· air one’s linen in public家丑外扬

The wife was often beaten by her husband, but she never told others. She didn’t want to air her linen in public.