The other two, thymine and cytosine, are single ring structures called pyrimidines.另两个为胸腺嘧啶和胞嘧啶, 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 、 鸟嘌呤和胞核嘧啶.The DNA base compo...
Cytidine ( cytosine nucleoside ) A NUCLEOSIDE formed when cytosine is linked to Dribose via a � � - glycosidic bond.胞嘧 啶 核苷:当胞嘧啶通过β - 糖苷键与D- 核糖接合形成的核苷.The DNA base composition is 32.6 - 33.1 mol % guanine plus cytosine.D...
“ 晚安, " 马车又起动时, 他低低地说." Good - night, " he whispered, as the cab rolled away.雨停了,但是阴云密布,低低地笼罩在头上.The rain ceased but the clouds hung low and heavy overhead.等这篇冠冕堂皇的演说结束之后,福瑟琳格小姐低低地行了个屈膝礼.Miss Fotheringay made a low curts...
In the past he dallied with actresses and lady novelists.他过去曾与许多女演员和女小说家调情。The bureaucrats dallied too long.这些官僚拖拉了太久。He dallied with the idea of becoming an actor.他对当演员一事考虑过,但并不认真....