rev

v (-vv-) 1 [I, Ip] ~ (up) (of an engine) revolve; increase the speed of revolution （指发动机）旋转, 加快转速. 2 [Tn, Tn.p] ~ sth (up) cause (an engine) to run esp quickly, as when starting a car 使（发动机）运转（尤指快速, 如起动汽车时）: Don't rev the engine so hard. 别让发动机转得太快. * Rev it up to warm the engine. 让发动机转起来预热.

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