She dipped a quill in ink, then began to write.她将羽毛笔在墨水里蘸了一下，随后开始书写。He wrote with a quill.他用羽毛笔写字.Suddenly she dropped the quill as a wild happiness flooded her.她突然感到一阵无限的快乐,当即丢开了手里的鹅毛笔....
核内的加工酶切下内含子,同时外显子 ( 编码序列 ) 连接在一起.The introns are cut out by processing enzymes in the nucleus and the exons ( coding sequences ) ligated together.结论国内dystrophin基因44～51号内含子高度不稳定,容易发生断裂.Conclusions Introns 44 ~ 51 were hig...
They are acrylaldehyde hydration, ethylene oxide formylation and biological zymolysis methods.即丙烯醛水合法, 环氧乙烷甲酰化法,生物发酵法.Secondly, take p - nitrophenol as the raw material, studing the effect of Duff formylation reaction.其次...