当你写英语单词或句子时，你可以使用有线条的纸。

When you write English words or sentences, you can use paper with lines.

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例如，经过训练的观察者主要通过对光谱中出现的简单线条的精确分析来获取关于恒星的大量信息。

For example, trained observers obtain a very large amount of information about a star mainly from the accurate analysis of the simple lines that appear in a spectrum.

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我们的祖先在描绘人类形象时，通常会把人画成粗线条的简笔画；但假如要画人的面部，几乎所有的眼睛都是非常突出的，睁得又大又圆。

When our ancestors drew humans, they would often draw them as stick figures, but if they drew a face, then the eyes were almost always very prominent—very open and wide.

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Spectroscopy is how you go and look at patterns, not just individual lines.

光谱学就是你怎样运行和看待一个图案的，而不是单独的线条。

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Think of the texture of music and think of these strands of high and low.

让我们思考音乐的织体,以及这些高低的线条

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Now what does the line represent here?

那么这些线条所代表的意义又是什么

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