One cannot be too careful in guarding Party and state secrets.
保守党和国家的机密，慎之又慎。
怎么小心谨慎也不会过分。
One cannot be too careful in matters like that.
人们在处理这种事情时必须非常慎重。
One cannot be too careful while driving in the area.
在该地区开车越细心越好。
One cannot be too careful in making the decision as it was such a critical case.
因为这是一个如此重要的问题，所以做决定时无论多么谨慎都不算过分。
One cannot be too careful in making the decision as it was such a critical case.
因为这是一个如此重要的问题，所以做决定时无论多么谨慎都不算过分。
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