complicit

Several officers were complicit in the cover-up.

几名军官串通一气隐瞒真相。

《牛津高阶英汉双解词典》

If they were complicit in the commission of a crime, then they should be investigated.

如果他们在此次犯罪中有同谋关系, 那么他们就应该接受调查.

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