Washington kept a record of his life, in letters and journals.

华盛顿以日记或信件记录他的生活内容。

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Looking at the human genome as a "book of life" they have mapped vast Numbers of variations in letters or short words - but missed much larger deletions and duplications of pages or chapters.

如果把人类基因组视作“生命之书”，他们绘制了大量字母或短语的变异——但忽视了“书”中篇幅更大的整页乃至整章的删节和重复内容。

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In all existing life forms, the four "letters" of the genetic code, called nucleotides, are read in triplets, so that every three nucleotides encode a single amino acid.

在所有现有的生命形式中的四个“字母”的遗传密码，即核苷酸，是以三个为单位读取的，每三个核苷酸编码成为一个单独的氨基酸。

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This is the first collection of his letters, and, ample though it is, it represents only a small proportion of the huge number of letters that Toscanini wrote in a long life.

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The activists threatened the action in letters sent to investors because the drug company uses Huntingdon Life Sciences , a controversial animal-testing company.

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Ted Hughes died in 1998, the year he published Birthday Letters, a series of poems about his life with Plath and her death.

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