1. 换气孔,小窗,枪眼：succor 援助 | loophole 换气孔,小窗,枪眼 | blazon 以家徽装饰,宣布

2. 大爆劫：Looker, The 催眼 1982 | Loophole 大爆劫 1981 | Loose Screws Miss正斗 1986

3. 枪眼：loophole certificates 漏洞融通证明书 | loophole 枪眼 | loopworm 尺蠖

1. （法律上的）漏洞，空子
A loophole in the law is a small mistake which allows people to do something that would otherwise be illegal.

e.g. It is estimated that 60,000 shops open every Sunday and trade by exploiting some loophole in the law to avoid prosecution.
据估计，每逢周日开门营业的店铺有6万家，通过钻法律漏洞躲避检控。

noun

1. a small hole in a fortified wall
for observation or discharging weapons

2. an ambiguity (especially one in the text of a law or contract) that makes it possible to evade a difficulty or obligation