go off
1．make a sudden ringing noise爆发突然的响声
A bomb went off in the theater．一颗炸弹在剧院里爆炸了。
2．leave suddenly（突然）离走
They went off without telling us．他们走时没有告诉我们。
She went off in a bad temper．她怒气冲冲地走了。
3．cease；wear off；disappear终止；消失
The effect of the drug will go off after two hours．两小时后这药的效力就将失去。
4．sell；be disposed of by sale卖掉；售出
The goods went off rapidly．那批货很快就卖掉了。
5．become worse；deteriorate变坏（质）
I'll complain to the shop；this meat started going off the same day that I bought it．我要向这家商店申诉，我买的肉当天就变质了。
You had better put the cake in the refrigerator，in case it goes off．你最好把蛋糕放入冰箱，以免坏掉。
The milk has gone off slightly．It must be the weather．这牛奶已经变质。一定是天气的关系。
6．elope私奔
He went off with his manager's daughter．他和经理的女儿私奔了。
7．lose one's skill失去技巧；工作质量下降
The standard of his work has gone off over the last few weeks．这几个星期以来，他的工作水平有所下降。
The lecturer used to do well，but he seems to have gone off now．这位讲师以前课讲得不错，现在似乎教学质量在下降。
The football team seemed to go off．这个足球队似乎在滑坡。
8．fall asleep；pass into unconsciousness入睡；失去知觉Grand father's gone off in the chair．爷爷在椅子上睡着了。
He didn't seem to be able to go off，so he went into the kitchen and made himself a cup of tea．他似乎睡不着，因此他走进厨房给自己泡了一杯茶。
The old woman went off into a faint．这位老太太晕倒失去了知觉。
9．lose one's liking for（coffee，beer，pop music，painting，etc．，as a hobby）不再爱好
He went off driving altogether after his accident．那场事故以后，他讨厌开车了。
10．become unavailable（water，gas，electricity，power，etc．）得不到；突然中断供应
Just as the weather turned cold，the electricity supply went off．正当天气转冷时，电力供应却中断了。
The light went off as we entered the room．我们进屋时停电了。
11．go mad；behave in a crazy manner发疯；发狂
Poor old Tom went off his head，spent all his money in six months and ended up begging in the streets．可怜的老汤姆头脑发热了，在6个月内把钱全部花掉，最后到街上去行乞。
12．be carried out；take place；proceed进行；发生；举行
The party went off without any trouble．聚会顺利进行，没有任何麻烦。
She had the operation this morning and it all went off quite well．她今天上午动了手术，一切很顺利。