周转圆

例句：

1. 1. The company's turnover has increased significantly in the past year.
   该公司的营业额在过去一年有显著增长。
2. 2. The machine's rotor is made of high-quality steel.
   这台机器的转子是由优质钢材制成的。
3. 3. The turnover ratio of the company's products has been declining recently.
   公司产品的周转比率最近一直在下降。