Critics attacked the youth and inexperience of his staff.批评家们抨击他的员工年纪太轻，缺乏经验。We laughed at her inexperience in the kitchen; she couldn't boil water.我们笑她缺乏厨房知识, 连烧开水都不会.There are signs of youth and inexperience in hi...
他获得了“原子可以再分”这一概念的专利权。He patented the idea that the atom could be split.天气预报概念的发展速度快得令人难以置信。The idea of weather forecasting developed incredibly quickly.哲学家停留在概念的王国里.A philosopher dwells in the realm of ideas....
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—...