由逻辑与和其后的逻辑非组成的逻辑运算符，如果两个运算域都是真，则返回的值便为假。

A logical operator that consists of a logical and followed by a logical NOT and returns a false value only if both operands are true.

youdao

由逻辑与和其后的逻辑非组成的逻辑运算符，如果两个运算域都是真，则返回的值便为假。

A logical operator that consists of a logical and followed by a logical NOT and returns a false value only if both operands are true.

youdao