concealment造句

I think there was deliberate concealment of relevant documents.
我认为有人故意隐瞒相关文件。

The criminals vainly sought concealment from the searchlight.
罪犯们徒劳地躲闪着探照灯光。

His concealment of his true motives was masterly.
他隐瞒自己真实动机的手段十分高明。

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