commutative relations

例句：

1. 1. The commutative propertyof a material is its ability to undergoreversible chemical reactions.
   材料的可交换性质是指其能够发生可逆化学反应的能力。
2. 2. The commutative law states thatthe sum of the roots of a quadratic equation equals the coefficient ofthe x-term in the equation.
   可交换定律指出，二次方程根的和等于方程中x项的系数。
3. 3.In commutative algebra,the order of an element in a groupis determined by its multiplication table.
   在群论中，一个元素在群中的阶由它的乘法表决定。