hammer away

• 苦心研究

hammer away的用法和样例：

例句

1. 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。
2. He hammer away on the door until he get an answer
   他连连敲门, 直到有人应声。