one circle goniometer

例句：

1. 1.The teacher used a one circle goniometer to draw the circle on the blackboard.
   老师用一个圆规在黑板上画了一个圆。
2. 2. She measured the length of the string with a one circle goniometer.
   她用一个圆规测量了绳子的长度。
3. 3. The engineer used a one circle goniometer to check the accuracy of the measurements.
   工程师用一个圆规来检查测量的准确性。