黑客进行的端口探测通常是尝试在服务器上执行恶意代码或者通过寻找易攻击的端口来控制服务器。
Port probing by hackers is usually an attempt to execute malicious code on a server or to take control of the server by looking for vulnerable ports.
指令码人员是将来的骇客，他们的知识足够对易攻击的机器执行预编码的指令码，但还没有足够的知识建立这样的指令码。
Script kiddies are would-be hackers who know enough to run a pre-coded script against a vulnerable machine, but not enough to create such a script in the first place.
除其他弱点外，城市在独自应对空气污染时而必须采取的措施存在政治上的争议，因此也很易受到攻击。
Among other weaknesses, the measures cities must employ when left to tackle dirty air on their own are politically contentious, and therefore vulnerable.
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