equivalence problem

例句：

1. 1. The equivalence of two languages is a complex issue that requires careful consideration.
   两种语言的等价是一个复杂的问题，需要仔细考虑。
2. 2.In economics, the concept of equivalence is crucial in determining the value of goods and services.
   在经济学中，等价概念对于确定商品和服务的价值至关重要。
3. 3.The equivalence problem has been a topic of discussion for decades, with many researchers trying to find solutions.
   等价问题已经讨论了几十年，许多研究人员试图找到解决方案。