So with his optic glass, his telescope, Galileo was able to discern spots on the orb of the moon.

因此通过他的磁光玻璃，望远镜，伽利略能够分辨出月亮轨道上的斑点。

耶鲁公开课 - 弥尔顿课程节选

It is a glass tube. He wants to narrow the light so he puts a couple of slits here.

这是根玻璃管子，他想要减少光的发散,所以在这里开了几个口子。

麻省理工公开课 - 固态化学导论课程节选