They took a number of tumbles after a few minutes'rest.休息几分钟后他们又翻了几个筋斗.Old World bird that tumbles or rolls in flight; related to kingfishers.东半球能在空中翻筋斗的鸟; 与翠鸟近缘.Then, in a final act of incredible courage, the last ...
The enzyme activity test results showed that aldolase could transform Nacetyl - D - ManNAc into N - acetyl - D - neuraminic acid very efficiently.经纯化后催化活性实验结果表明,醛缩酶可将N- 乙酰 -D- 甘露糖胺高效率地转化为N - 乙酰-D-神经氨酸,表现出较高的催化活性.The N - ...