Eric's
concealment of his true motives was masterly.
埃里克隐瞒自己真实动机的手段十分高明。
Tom's
concealment of sexual orientation is forced.
汤姆不得已隐藏自己的性取向。
The fraud cases involved large amounts of money and have been done systematically with a high level of concealment and complexity, according to the CSRC.
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