1、The addition operation is commutative, which means that changing the order of the numbers being added does not change the result.
加法运算是可交换的，也就是说改变相加的数字的顺序不会改变结果。
2、In mathematics, the commutative property is often used in the study of algebraic structures such as groups or rings.
在数学中，可交换性常常在研究代数结构，比如群或环时使用。