goniometer eyepiece

例句：

1. 1. The scientist used a goniometer to measure the angle of the sun's rays.
   科学家使用测角仪测量太阳光线的角度。
2. 2. The astronaut wore an eyepiece that allowed him to see through the spacecraft's windows.
   宇航员戴着一个目镜，使他能够通过宇宙飞船的窗户看到外面。
3. 3. The engineer tested the goniometer eyepiece before installing it in the machine.
   工程师在安装机器之前测试了测角仪目镜。