be on call
US /bi ɑn kɔl/
UK /bi ɒn kɔːl/
成语
待命, 值班
to be available to work if needed, especially outside normal working hours
示例:
•
Doctors often have to be on call during weekends.
医生们周末常常需要待命。
•
I can't go out tonight, I have to be on call for work.
我今晚不能出去，我必须待命工作。