另两个为胸腺嘧啶和胞嘧啶, 即称为嘧啶的单环结构.The other two, thymine and cytosine, are single ring structures called pyrimidines.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.Cytidine ( cytosine nucleoside ) A NUCLEOSIDE formed when cytosine is linked ...
但弗雷德觉得很无聊，想要回家。But Fred was bored and desired to go home.女士们，先生们，请为弗雷德·德斯特来点掌声。Ladies and Gentlemen, give it up for Fred Durst.烹调专栏主笔莫伊拉·弗雷泽会带您了解幕后的故事。Cookery Editor Moyra Fraser takes you behind the scenes....
参观酒窖前，游客们先观看了有声的视频介绍。Visitors are shown an audio-visual presen-tation before touring the cellars.嘉宝拍过24部电影，先是无声的，后是有声的。Garbo made two dozen films, first silent pictures then talkies.这些时常被人引用的话也可以拿来形容巴特铿锵有声的散文.These much ...
He flattened himself against a brick wall as I passed.他紧贴一面砖墙站着好让我通过。The car ploughed through three gardens and flattened a tree.小轿车轰然穿过3个花园，还碾倒了一棵树。She flattened out the crumpled letter on the desk.她在写字台上把皱巴巴的信展平。The ci...