1.promise to 许诺做；承诺

We can't promise to publish a reply as space is limited.

由于版面有限，我们不能保证把回复登载出来7P]xz(|k6#M。

2.be necessary to 对...有必要；为...所必要

It may be necessary to thin the sauce slightly.

可能有必要将酱汁稍稍稀释一下so2o2[X&ao。

3.at most 至多；最多

There were at most twenty people in the classroom.

教室里最多不过20人43C_aewLdI%S8E=。

4.only if 只要；除非

I'll go only if you go with me.

除非你跟我去，我才去b~z3cDUkb*SO。

xyBgOxCTB&er,3z.K3M5LH&+Q.SpuPUbh;kl]6^^cyP5,)%.EbBea 来源:可可英语 http://www.kekenet.com/broadcast/201906/588765.shtml