正如我们前面提到的，每一个建筑地盘是不同的。
As we mentioned before, each construction site is different.
正如我们前面提到的，您需要防范来自内部和外部的威胁。
As we stated earlier, you need to protect against internal as well as external threats.
正如我们前面提到的，您需要防范来自内部和外部的威胁。
As we stated earlier, you need to protect against internal as well as external threats.
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