If he’s not at home, he must still be at work.
She’s currently at work on a new book.
I found it fascinating to watch the young people at work.
You don’t know what forces are at work behind the scenes.
I found it fascinating to watch the staff at work.
英语词典包含67175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。