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—...
The campfire smouldered for hours after the blaze died out.营火在火焰熄灭后闷烧了好几个小时.The campers lit torches from the campfire.露营者用营火点燃火把.A group of boys and girls gathered around the campfire to sing songs.一群孩子围着一堆篝火唱歌....
The experiment above confirmes that sodium ferulate can antagonize ETB on Ast and displays protective function.上述实验证实,阿魏酸钠可拮抗星形胶质细胞上的ETB发挥保护作用.Conclusion: Burned serum may up - regulate ETB receptor.结论: 烧伤血清可上调亚型B内 皮素受体....
倒闭和失业的消息又在一次次地反复宣布着。Closures and job losses are again being announced with monotonous regularity.英国航天部门2万多人面临失业的危险。At stake are more than 20,000 jobs in Britain's aerospace sector.那些失业的人们想方设法以支付超市的账单。Those who have ...
The production lines ground to a halt for hours while technicians tried to debug software.生产线停工达数小时之久，在此期间技术人员试图纠除软件错误。We'll use DEBUG to look at a floppy disk's Boot Record.我们将使用DEBUG来看看软盘的引导记录.This paper pres...