签名运动
Every girl must sign in when she comes back to the dormitory. 每个女生回到宿舍的时候都必须签到。
Members must sign in any guests that they bring to the club. 俱乐部成员必须为其带到俱乐部所有客人们登记。
Did you read the sign in front of you. 你看过你面前的告示吗?
All visitors must sign in on arrival. 来客均须签到。
They signed in at the reception desk. 他们在接待处签到。
The old man made a sign in the affirmative. 老人作了一个肯定的表示。
