1.Rev up 加快；加速

例句:The temptation to rev up the arms race with high-tech weapons is especially dangerous.
通过研发高科技武器加速军备竞赛的诱惑尤其危险。

2.pour off 流出

例句:Please pour off the fat left in the meat tin.
请把肉罐头盒里剩下的肥油倒掉。

3.let alone 更不必说；放任

例句:He did not have enough money to have the tire patched up, let alone buy a new one.
他的钱还不够补这个轮胎，更别提买个新的了。

4.a series of 一系列

例句:The students have put forward a series of questions.
学生们提出了一系列问题。