We shall hammer away at this problem till we get a solution.
我们将努力研究这个问题，直到找出一个解决办法。
That lesson is not easy, but hammer away at it and you will get it right.
那课书不容易，但只要你坚持学，你是会学好的。
He used a hammer and chisel to chip away at the wall.
他用锤子和凿子将墙壁一点点凿掉。
He was chipping away at the rock with a hammer.
他在用铁锤把那块岩石一小块一小块地敲下来。
The handle of the hammer came away easily.
这锤柄很容易脱落。
The handle of the hammer came away easily.
这锤柄很容易脱落。
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