There are just four kinds: adenine, thymine, guanine and cytosine.
只有4种: 腺嘌呤 、 胸腺嘧啶 、 鸟嘌呤和胞核嘧啶.
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The DNA base composition is 32.6 - 33.1 mol % guanine plus cytosine.
DNA(脱氧核糖核酸)的G+C 摩尔百分含量为32.6—33.1.
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It is a layer of guanine crystals which glow at night.
这是的氨基羟尿环水晶层数发光在晚上.
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The most abundant bases are cytosine, thiamine , and uracil ( pyrimidines ) and adenine and guanine ( purines ) .
最丰富的碱基是胞嘧啶, 胸腺嘧啶, 尿 嘧 啶,腺嘌呤和鸟嘌 呤.
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