reciprocal system

例句：

1. 1. The company's profitability is closely tied to its reciprocal system of supply and demand.
   该公司的盈利能力与其供需的互惠系统密切相关。
2. 2.The reciprocal system of the two countries has helped to resolve many conflicts.
   两国之间的互惠体系有助于解决许多冲突。
3. 3. In a reciprocal system, each party makes a trade with another party in return for something they want or need.
   在互惠体系中，每一方都与另一方进行交易，以换取他们想要或需要的某物。