1、come down

(成本、水平或数量)下降，降低

Interest rates should come down.

利率应该降低。

If you buy three bottles, the bottle price comes down to 2.42 pounds.

如果买3瓶，价格会便宜一些，每瓶2.42英镑。

落下;降落

The cold rain came down.

下起了冰冷的雨。

The curtain came down after the first act.

第一幕过后，幕布落了下来。

2、go off

对…不再喜欢；失去对…的兴趣

Why have they gone off him now?It could be something he said.

“他们现在怎么不喜欢他了？”“可能是因为他的某些言论。”

I started to go off the idea.

我开始对这一想法失去兴趣了。

（爆炸装置）爆炸；（枪）开火

A few minutes later the bomb went off, destroying the vehicle.

炸弹几分钟后爆炸，炸毁了那辆车。

进行；进展

The meeting went off all right.

会议进行得十分顺利。

The voting went off without any undue irregularities.

这次投票顺利进行，未发生任何违规行为。