equivalence of functions

例句：

1. 1. The two sides reached an equivalence in their demands.
   双方在要求上达成了平衡。
2. 2. The physicist found the equivalence of energy and matter.
   物理学家发现了能量与物质的等价关系。
3. 3.The company's profits were equivalent to those of its competitors.
   该公司的利润相当于竞争对手的。