The ash clouds include particles of rock, glass and sand that can get into an aircraft's engine and cause it to stall.

VOA: standard.2010.04.17

but from the inside, you know, there's a lot of glass.And you can, like... There's a lot of natural light,

但是从里面看，有很多玻璃。这里有很多自然光，

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So first if Professor Drennen can try it through the glass, and we see nothing's happening.

首先如果Drennen教授可以,尝试让它穿过玻璃，我们看到什么都没有发生。

麻省理工公开课 - 化学原理课程节选