英语语法分析

So how do we know which spectral patterns match up with which elements?

那么我们如何知道哪些光谱模式与哪些元素相匹配呢？

I want you to notice that this spectrum is interrupted by dark lines called spectral lines.

我想让你们注意到的是，这一光谱是被叫做光谱线的暗线所打断的。

There was a pretty extensive library of spectral line patterns of elements even by the 1860s.

甚至在19世纪60年代，就已经有了一个相当广泛的元素谱线模式库。