以下为句子列表：
英文: Sequencing DNA has come down in price by half annually, from $10 per base pair in 1990 to under a penny today.
中文: 资讯科技通常不要一年，价格表现比和产能就会增加一倍。
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英文: The base pair ratio, AT:GC, is constant within a species but differs between species.
中文: AT:GC之间的碱基比具有种内特异性，但在不同种之间往往是不同的。
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