她注意到，在该动物的染色体两端是一个重复的DNA序列，这个序列用字母表示就是CCCCAA。

She noticed that at the end of each of the creature's chromosomes was a repeating sequence of DNA, spelt out by the letters CCCCAA.

youdao

阿芝台克人使用不同的象形文字，基本上与玛雅人相同，只有少许改进。尽管是用来表示能量，他们的象形文字是用字母表示。

The Aztecs use different glyphs and is basically the same as the Mayan only slightly less evolved. Their glyphs are better in their representations of the energies though.

youdao

They are linked together by four different colored segments indicated here not by colors now but by letters.

它们由四个不同颜色的片段连接,这里不是用颜色表示,是用字母表示

耶鲁公开课 - 生物医学工程探索课程节选

And to measure the intensity of unequal sharing, we take the difference in electronegativity, which I am going to use the Greek symbol chi for.

要度量非平均的程度，我们考虑电负性的差异，我要用希腊语第22个字母chi来表示电负性。

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This might look a little cryptic at first, but it turns there is some very obvious patterns here, for instance. According to this chart, if you want to represent the letter A A in the so called ASCII system, what number do you actually use to do so?

起初，它看起来有点神秘，但你会发现它有一些明显的对应模式，这里就有例子，根据图表，在所谓的ASCII系统中,你想表示字母，你该用哪些数字呢？

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