后门的英文：
back door
postern
参考例句：
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The back door is not well hinged.
后门的铰链安得不好。
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and all of our OS software for the past 6 years
一个用于接受synapse信息的后门
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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).
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The hinged rear door of a hatchback.
仓门式后背有铰链的后门
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Backdoor deal
后门交易
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Backdoor financing
后门融通资金
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The thief escaped by the backdoor.
贼从后门逃走了。
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We slipped out of the postern door of the castle
我们从城堡的后门溜出。
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Key to the back door under the mat.
后门钥匙在脚垫下。
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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
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Stand back to back!
背靠背站好！
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They are on the back of the menu.
它们在菜单背面。
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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
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The door was unclosed.
门被人打开了。
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This door is manual.
这个门是要用手操作的。
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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
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He rushed to the nearest postern.
他奔向了最近的后门。
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He walked out of the postern and disappeared into the darkness.
他走出后面，消失在黑暗中。
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We slip out of the postern door of the house.
我们从房子的后门溜出。
