ratio code

例句：

1. 1. The company uses a ratio code to track the number of employees working on each project.
   该公司使用比率代码来跟踪每个项目上工作的员工数量。
2. 2. The ratio code is used to calculate the average speed of the trains.
   比率代码用于计算火车的平均速度。
3. 3. The ratio code helps us to quickly identify which products are more popular among customers.
   比率代码帮助我们快速识别哪些产品更受顾客欢迎。