1. - see rev 1

2. (使)更激烈;(使)更活跃
If you rev something up, or if it revs up, it becomes more intense or more active.

e.g. 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。
e.g. Now he plans to rev up publicity with a regional media campaign.
现在他准备通过开展地区性的媒体活动加大宣传力度。

verb

1. increase the number of rotations per minute

e.g. rev up an engine

Synonym: rev

2. speed up

e.g. let's rev up production

Synonym: step up