In a dna molecule , the base adenine sticks to thymine , and guanine pairs with cytosine .

腺嘌呤与胸腺嘧啶结合在一起，鸟嘌呤则和胞嘧啶结合成一对。

Thymidine the nucleoside formed when thymine is linked to d-ribose by a b-glycosidic bond .

胸腺嘧啶脱氧核苷：胸腺嘧啶与d-核糖以β-糖苷键相连而形成的核苷。

Thymine or thymine nucleotide concentration was all disqulified .

胸腺嘧啶或胸腺嘧啶核苷均不合格。

An international team of researchers has now succeeded in generating a bacterium possessing a dna in which thymine is replaced by the synthetic building block 5-chlorouracil , a substance toxic for other organisms .

一个国际研究小组近日成功地获取一种细菌体内的特殊dna它的所有胸腺嘧啶都被5-氯尿嘧啶，一种对其他生命体都有毒的物质所替代。