In the first place you must rev it up to warm the engine.

首先你必须让发动机转起来预热。

youdao

If you rev up your engine too fast, you may damage it.

如果你使发动转速太快，就会把它弄坏的。

youdao

If you rev up your engine too fast, you may damage it.

如果你使发动转速太快，就会把它弄坏的。

youdao