back door
ˌback <ʃOŋð style="font-weight:normal">'doornoun C
1. a door at the back or side of a building后门; 旁门，侧门
2. get in through the back door to achieve something by having an unfair secret advantage走后门:•His father works there so he got in through the back door.他父亲在那里做事，所以他走了后门。
