range of a relation的用法和樣例：
例句
- Meanwhile, we proposed some relevant theorems or regulations to solve the security problems of mutable attribute range.
同時提出相應的一些定理或規則，從而初步解決可變屬性的值域安全問題。 - It is perhaps worth a short digression to discuss the possibility of the range of an operator not being closed, and its consequences.
在此值得稍離本題討論運算元的值域非閉的可能性及其推論。
