get work done
⇒ 他花了很长时间,但就是不出活。
He spent a lot of time on it, but didn't actually get any work done.
efficient
英语词典包含298861条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。