Where each different letter stands for a different gene.
在这一组的分子式中，每一个字母都代表一个不同的基因。
A different Love letter and a beautiful reply to it.
一封与众不同的情书，以及美妙的回复。
But this letter was different from those he sent to me before.
可这封来信与以往叔叔寄来的信不同。
Read a different letter by Marty. What advice does he give John?
阅读玛蒂不同的信，他给了约翰什么建议？
Each letter can even go to different recipients.
每封信也可以发送给不同的收件人。
They showed each letter with different poses.
他们通过不同的姿势展示每一个字母。
From different angles of view, the letter "a" could be interpreted differently.
从不同的角度我们可以对A字做出不同的解读。
I can't tell how many letter groups there are, because everybody includes different things.
组合具体有多少组合，我也说不上来。因为划分的不同。
Work on the different pronunciations of the letter o.
学习字母o在单词中的读音。
Work on the different pronunciations of the letter o.
学习字母o在单词中的读音。
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