walk in

n.

person who walks in without having an appointment

同义词：walk-in

an operative who initiates his own defection (usually to a hostile country) for political asylum

同义词：walk-in

an assured victory (especially in an election)

同义词：walk-inwaltz

a small room large enough to admit entrance

同义词：walk-in

1. She walked in and sat down without saying a word.
   她走了进来，没说一句话就坐了下来。
2. The doctor accepts walk-ins, so you don't need an appointment.
   这位医生接受随到随诊的病人，所以你不需要预约。