control point of route

例句：

1. 1. The control point is crucial forthe safety of the operation.
   这个控制点对于操作的安全至关重要。
2. 2. The engineers carefullychecked the control points before starting the project.
   工程师们在开始项目之前仔细检查了控制点。
3. 3. The control point was used tomonitor the progress of the construction.
   这个控制点被用来监控施工的进度。