现在看它没什么道理，它们在光谱学里也不这么用了，但这些名字，从这里面起源后来就一直沿用下来了。

It doesn't even make sense now, they're not used in spectroscopy anymore, but this is where the names originally came from and they did stick.

youdao

It doesn't even make sense now, they're not used in spectroscopy anymore, but this is where the names originally came from and they did stick.

现在看它没什么道理，它们在光谱学里也不这么用了，但这些名字,从这里面起源后来就一直沿用下来了。

麻省理工公开课 - 化学原理课程节选