circulation of costs

例句：

1. 1.The blood flows through the body in a constant circulatory system.
   血液在身体内以恒定的循环系统流动。
2. 2.The company's stock price has been circulating around $50 per share.
   该公司的股票价格一直在每股50美元左右徘徊。
3. 3. The new policy will have a significant impact on the global economy's circulatory system.
   新政策将对全球经济的循环系统产生重大影响。