The other two, thymine and cytosine, are single ring structures called pyrimidines. 另两个为胸腺嘧啶(T)和胞嘧啶,即称为嘧啶的单环结构。
There are just four kinds : adenine, thymine, guanine and cytosine. 只有4种:腺嘌呤、胸腺嘧啶(T)、鸟嘌呤和胞核嘧啶。
Then they timed the reactions that caused the new thymine bonds to form. 然后他们记录了产生新的胸腺嘧啶(T)键形成的反应。
It stores information as a sequence of chemical building blocks ( nucleotides ) we call A, C, T, and G ( for adenine, cytosine, thymine, and guanine in DNA, and uracil replacing thymine in RNA ). 它将信息存储为化学基本成分序列(核苷),我们将其称作A、C、T和G(表示DNA中的腺嘌呤、胞嘧啶、胸腺嘧啶(T)和鸟嘌呤,以及RNA中的尿嘧啶代替胸腺嘧啶(T))。
DNA consists of a chain made from four types of nucleotide subunits : adenine, cytosine, guanine, and thymine. 的DNA链组成一个由4种核苷酸亚基:腺嘌呤,胞嘧啶,鸟嘌呤和胸腺嘧啶(T)。