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—...
It exists in dreams rather than actuality.它存在于梦境而非现实中。The building looked as impressive in actuality as it did in photographs.这栋大楼外观雄伟，与照片中所见一模一样。A trip to the moon is now an actuality.登月旅行现已成为事实....
Objective To ease the adverse reaction of whole cell preparation of Corynebacterium parvum.目的减轻短棒状杆菌全菌体制剂接种后的局部疼痛等副作用.To evaluated the efficacy of intrapleural Corynebacterium parvum for the treatment of malignant pleura...
首相已听取了她议会助手的简要汇报。The Prime Minister has been briefed by her parliamentary aides.这张地毯是首相送的结婚礼物。The carpet was a wedding present from the Prime Minister.首相承诺以色列将发挥积极的作用。The Prime Minister has promised that Israel will play...
Silver polishes easily with this special cloth.用这块特殊的布能很容易把银擦亮.No matter what he is offered to eat he polishes it off in an instant.不管给他吃什么，他都能眨眼就下肚。The bronze still hanging in the side wall, polishes.那铜牌仍旧挂在侧墙上, 被擦得铮亮....
The cost of the immunizations was about $600,000 all told.接种疫苗的成本合计约60万美元。All told there were 104 people on the payroll.在职的总共有104人。All told, it seems like an awful mess.总之似乎一团糟。...