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...
The following paragraphs deal with intra - source offsets and the so - called " bubble " concept.下面讨论污染源内部的补偿和 所谓 的 “ 泡泡 ” 概念.This is called intra - block chaining.这叫做内部块链接(intra-blockchaining).Suggest choosing manners o...
Paddles are used especially to propel canoes and kayaks.短桨特别用于划独木舟和小艇.International events are held for one - man , two - man and four - man kayaks.国际比赛项目有单人 、 双人、四人皮艇.Canoes are open while kayaks are closed.划艇是敞开的,而皮艇是封...
Stir the batter every now and then to keep it from separating.不时搅动面糊,防止其成分散开。I like to smoke a big cigar every now and then.我喜欢不时地抽一支大雪茄.I see him every now and then, but not often.我偶尔看见他, 但不经常看见他....