补丁 patch--patches外补丁 margin内补丁 padding 漏洞 leak / flaw / loophole / vulnerability漏洞补丁 vulnerability patch 例句：这些攻击被称为“零天”攻击，发生在人们意识到系统中存在需要打补丁的漏洞之前。 These attacks were called "zero day" attacks, occurred in people aware of systems in need of patching the loopholes before.
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