equivalence of valuation

例句：

1. 1. The equivalence of two numbers is their absolute value.
   两个数的等价是它们的绝对值。
2. 2.The equivalence of the two forces is the balance of the system.
   两种力相等时，系统达到平衡。
3. 3. The equivalence of the two sides in a trade deal is crucial to its success.
   贸易协议中的双方等价是其成功的关键。