这些系统各有其优缺点。
但是也不全是，仍有许多公司雇佣黑客来分析他们自己的系统的优缺点。
But not completely as, there are still many companies who hire hackers to analysis the weaknesses or the strength of their own systems.
与其他国家一样，中国“靶子”系统的优缺点也很明显。
With China, as with other countries, this bulls-eye system has strengths and weaknesses.
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