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Password is the first line of defence of network system.
口令是网络系统的第一道防线。
youdao
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The second part concerns the coastal defence system and city of construction.
第二部分，海防卫所制度与城池建设分析。
youdao
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The second part concerns the coastal defence system and city of construction.
第二部分，海防卫所制度与城池建设分析。
youdao