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.嘌呤为嘧啶取代或嘧啶为嘌呤所取代,叫做颠换.The substitution of a purine for a pyrimidine, or vice versa is a transversion.本文研究氟脲嘧啶(5—...
Taxis must conform to the rigorous standards laid down by the police.出租车必须遵守警方的严格规定。Like most "peacetime wars" it did not conform to preconceived ideas.如同大多数“和平时代的战争”一样,这与我们的预想不同。Many children who can't or don'...
The cough medicine contains an expectorant.咳嗽药中含有祛痰剂.Objective: In this paper, antitussive , antiasthmatic and expectorant action of chenodeoxycholine acid ( CDCA ) were studied.目的: 本文研究鹅去氧胆酸 ( CDCA ) 对呼吸系统的影响.Aim To stu...
一张只读存储光盘能容纳500兆以上的数据。A single CD-ROM can hold more than 500 megabytes of data.一张只读光盘能存储25万多页键入的文本。A CD-ROM can store more than 250,000 pages of typed text.一张光盘可以存储十多万多页的文字资料。One CD-ROM disk can hold over 100,000 pages of...
Methods Clinical data of postoperative dysuria in 9 cases after suprapubic prostatectomy were analysed retrospectively.方法回顾性分析9例耻骨上前列腺摘除术后发生排尿困难病例的临床资料.Urethral dilatation combined open operation or transurethral electro...