研究人员还表示,在佩特里培养皿中的脑细胞前体可以发育成神经元.The researchers also showed that the progenitors mature into neurons in Petri dishes.植树细胞中丙氨酸和亮氨酸 、 缬氨酸的主要前体是丙酮酸.In plant cells the principal precursor of alanine , as well as leucine and v...
在焊接处看到了夹渣, 气孔及未熔透区的油漆.Slag, blowholes, and paint on unfused regions were observed at the welded junctions.焊接处要平整.Welding shall be ground smooth.对于铝合金 、 铜 、 镁 、 锌合金铸造与焊接处之间的研磨性具有很好的效果.The products have a good effect on gr...
Ecologists argue that the benefits of treating sewage with disinfectants are doubtful.生态学家认为用消毒剂处理污水是否有益值得怀疑。Other substances used to prevent disease or infection include disinfectants and germicides.用来预防疾病或感染的其它物质有消毒剂和灭...
我已经记不得如何去写草书的大写字母Z。I can't remember how to write a capital Z in cursive.在植物学领域,这些最早的著作是本草书.The first of these in the field of botany were the herbals.他写草书.He write a running hand....