the appearance of someone or something, especially when intended to deceive

The men who arrived in the guise of drug dealers were actually undercover police officers. 以毒贩身份到来的人实际上是卧底警察。

The company has been accused of trying to sell their products under the guise of market research. 这家公司被指控试图打着市场调研的幌子销售其产品。