conoscope

例句：

1. 1.The scientist used a conoscope to examine the sample.
   科学家使用直视镜来检查样本。
2. 2.The astronaut used a conoscope to observe the planet from space.
   宇航员使用直视镜从太空观察行星。
3. 3.The engineer used a conoscope to measure the distance between two points.
   工程师使用直视镜测量两点之间的距离。