Sys是一个逻辑字段，其值可以为真或假。

Sys is a logical field that can be either yes or no.

youdao

表达式节点支持包含算术和布尔(真或假逻辑)运算符的简单表达式。

Expression nodes support simple expressions involving arithmetic and Boolean (true or false logic) operators.

youdao

摘要逻辑实证主义认为形而上学表述的都是经验之外的命题，由于它们无法被证实真与假，所以根本就没有意义。

Logical positivism thinks that metaphysical propositions beyond experience cannot be verified as truth or falsehood so that they are meaningless at all.

youdao