range of a relation

• 关系的值域

range of a relation的用法和样例：

例句

1. Meanwhile, we proposed some relevant theorems or regulations to solve the security problems of mutable attribute range.
   同时提出相应的一些定理或规则，从而初步解决可变属性的值域安全问题。
2. It is perhaps worth a short digression to discuss the possibility of the range of an operator not being closed, and its consequences.
   在此值得稍离本题讨论算子的值域非闭的可能性及其推论。