托福听力的一段话 求翻译I want you to know this that this spectrum is in

托福听力的一段话 求翻译
I want you to know this that this spectrum is interrupted by dark lines called spectral lines. If you really magnify the spectrum of the sunlight, you could identify more than 100,000 of them. They may look like kind of randomly placed, but they actually form many distinct patterns.
这个 100,000 of them. They may look like 里面的them 和 they 是指的哪个词呢
我分不清是指的spectrum
还是dark lines called spectral lines
请问为什么，怎么看出来的，谢谢大家