two colour tracker

例句：

1. 1. The two-colour tracker is an essential tool for tracking the movement of animals.
   双色追踪器是追踪动物移动的必备工具。
2. 2. The two-colour tracker helped us to monitor the progress of the construction project.
   双色追踪器帮助我们监控了建设项目的进度。
3. 3. The two-colour tracker was used to mark the boundaries of the new park area.
   双色追踪器被用来标记新公园区域的边界。