work at

1be engaged in 致力于;从事于;钻研

He is working at a new subject.他正在研究一门新的学科。

You will have to work at the weak points if you want to pass the examination.你要想考试过关就得在你的薄弱环节上下功夫。

2do sthwith effort 在…上下功夫

You'll crack this problem if you really work at it.只要你下功夫就能解决这个问题。

 


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