来自《耶鲁大学开放课程：新生有机化学 第5集 第5集》

• 
  
  What happens to the spots?
  这些点怎么了
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  Farther apart.
  形状变的不规则了
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  Does that surprise you?
  这是很奇怪的现象吗
• 
  
  That's that reciprocal --
  是因为倒置
• 
  
  That's that reciprocal relationship.
  对 就是倒易关系导致的
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  When things get closer together the angles get bigger.
  当点越是靠近角度会变得越大
• 
  
  Okay, now things are going to get darker here.
  好了 教室里已经很暗了
• 
  
  So I'm going to do some things.
  我接下来就
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  Turn that out and also get the room light.
  把灯打开吧
• 
  
  Well no, I want to show you something here first.
  不对 我还想先给你们看看别的东西
• 
  
  Okay, so I'm going to show you what the masks are going to be
  我会让你们知道什么是衍射面具
• 
  
  and then we'll show you the effect from the masks.
  接着呢会让你们了解它的影响