清单8中的代码尝试攻击invulnerable。
还有一点很清楚，攻击者实际上并不需要源代码。
It's also clear that attackers don't really need source code.
这部分代码不占用运行时间、不会被破解攻击、不需要任何维护。
They cost no time, they are unbreakable, and they do not need any maintenance.
这部分代码不占用运行时间、不会被破解攻击、不需要任何维护。
They cost no time, they are unbreakable, and they do not need any maintenance.
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