hard at it

• adj. 勤劳地工作

hard at it的英文翻译是什么意思，词典释义与在线翻译：

参考翻译

• 努力工作

hard at it的用法和样例：

例句

1. I've been hard at it all the morning.
   我一上午都在卖力地干。
2. The policemen were already hard at it when we reached the scene of the accident.
   当我们到达肇事地点时，警察们已经在哪里忙开了。