if it was just one and three, will be strong,

三者叠加光会很强
because this one halfway in between will reinforce.

因为中间这一个也会发生增强
So closer together, further apart.

所以距离越小角度越大
And if you have a whole row of equally spaced things,

而一列电子全都间距相等时
they'll all be together,

类似地也会发生全部增强
according to whatever the distance between successive ones is.

其角度与间距直接相关
Yes, Shai?

怎么了沙伊
What are the chances that electrons are going to be spaced evenly along

电子有可能会这么均匀有序地排列吗
Ah, what could cause electrons to be spaced exactly evenly?

啊什么情况下电子会如此均匀地排列?
A crystal.

在晶体里
X-ray crystallography, right?

都听说过X射线单晶衍射是吧?
So that's why you use crystals.

所以样品一定要是晶体