后门的英文：
back door
postern
参考例句：
The back door is not well hinged.
后门的铰链安得不好。
and all of our OS software for the past 6 years
一个用于接受synapse信息的后门
Stage door (entrance at the back of a theatre used by actors,theatre staff,etc)
剧场后门(供演员、职员等进出的).
The hinged rear door of a hatchback.
仓门式后背有铰链的后门
Backdoor deal
后门交易
Backdoor financing
后门融通资金
The thief escaped by the backdoor.
贼从后门逃走了。
We slipped out of the postern door of the castle
我们从城堡的后门溜出。
Key to the back door under the mat.
后门钥匙在脚垫下。
He rushed to the nearest postern.
他奔向了最近的后门。
back是什么意思：
n. 后面，背面，反面；背，背部；靠背；后卫
v. 支持；后退，倒退；背书；下赌注于
adj. 背部的；后面的；过去的；拖欠的.
adv. 以前；向后地；来回地；上溯
Stand back to back!
背靠背站好！
They are on the back of the menu.
它们在菜单背面。
Our seats on the train were back to back.
我们在火车上的坐位是背靠背的。
door是什么意思：
n. 门，门户；途径
The door was unclosed.
门被人打开了。
This door is manual.
这个门是要用手操作的。
Who is knocking the door || Who is knocking || Who is at the door || Who is knocking at the door?
谁在敲门
postern是什么意思：
n. 后门；暗道
adj. 后面的；后门的
He rushed to the nearest postern.
他奔向了最近的后门。
He walked out of the postern and disappeared into the darkness.
他走出后面，消失在黑暗中。
We slip out of the postern door of the house.
我们从房子的后门溜出。
