on duty today 什么意思?

on duty today 什么意思? is on duty today Who's on duty today.的中文意思是什么啊 whose on duty today改错 what is on duty today? who is on duty today Who is on duty today?为什么用on duty ____is on duty today?——Lily. Who is on duty today ?是什么意思 谢谢 Whos on duty today中文是什么意思 I'm on duty today翻译 whose turn is it ( ) on duty today