valid concept的意思|示意

Static assertions build on this basic concept, except that static assertions are valid only at compile time.

静态断言建立在这个基本概念之上，只不过静态断言仅在编译时有效。

We believed that since the valid concept is may change, then the fidelity concept is also may change.

我们认为：既然有效性概念是可以变化的，那么保真性概念也是可以变化的。

Psychologically, having it all is not even a valid concept.

从心理学角度说，拥有一切甚至都不是一个有意义的概念。