crank something up

• vt. 开始做某事

例句

用作及物动词 (vt.)

1. When they first start working on something, they overrate their achievements.
   当他们刚开始做某一件事时，他们高估了自己的成就。
2. David is a person who likes to do everything, and once he begins to do something, he never falls by the wayside.
   大卫是一个喜欢什么都想试一试的人，一旦他开始做某事，他就从不半途而废。