sign in
phrasal verbsign in/out | sign somebody in/out
- to write your/somebody’s name when you arrive at or leave an office, a club, etc.
签到／签退；替某人签到／签退 - All visitors must sign in on arrival.
来客均须签到。 - You must sign guests out when they leave the club.
客人离开俱乐部时，你必须为他们签退。
- All visitors must sign in on arrival.