commutative primitive

例句：

1. 1.The commutative property of the material is important for its use in engineering.
   这种材料的可交换性质对于其在工程中的使用很重要。
2. 2. The exchange rate between the two currencies is commutative.
   这两种货币之间的汇率是可交换的。
3. 3. In commutative algebra, we study polynomials with coefficients that can be multiplied and divided by each other.
   在可交换代数中，我们研究系数可以相互乘除的多项式。