柯林斯词典sign in (signing,signed,signs) 1. PHRASAL VERB If you sign in, you officially indicate that you have arrived at a hotel or club by signing a book or form. (在旅馆或俱乐部) 签到 I signed in and crunched across the gravel to my room. 我签到后便嘎吱嘎吱地穿过砾石路走到我的房间。 返回 sign in