sign in

动词 sign in:

1. announce one's arrival, e.g. at hotels or airports
   同义词：check in

1. Harrison also has promoted legislation to require immigrant businesses to post signs in English, which infuriated Asian business people but played well among longtime white residents.
   哈里逊又促使立法规定外国移民所开商号悬挂英语招牌。此举令亚裔商人异常愤怒，但深为长久居住此间的白人所喜。
2. 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。
3. 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。