这样做的原因非常简单：对原始内容进行整理之后，可以得到一个很小的但是唯一的加密结果(称为摘要)，这样比对原始内容进行签名花费的时间少。
The reason for doing this is simple: Digesting the original content generates a small but unique encrypted value (digest) that takes less time to sign as compared to the original content.
生物序列分析的主要研究内容包括序列比对、蛋白质结构预测、基因组序列分析等。
The biological sequence analysis research content mainly includes the sequence alignment, the protein structure prediction, and the genome sequence analysis etc.
对学习者而言，练习较短段落或语块中特定的对话或文本(故事)、大声说出每个段落的内容并与原文进行比对是极其必要的。
Then it is essential that learners listen to that particular conversation or text (story) in short paragraphs or chunks, say each paragraph aloud, and compare to the transcript.
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