这封信只不过重复了一下土地法。The letter merely restated the law of the land.能从其他废料中分离出可重复利用成分是很关键的。The ability to separate out reusable elements from other waste is crucial.他不想刻意重复那种讲话的语调。He is not attempting necessarily to reproduce ...
常常是用离心法分段收集沉淀的.Precipitates are usually collected by centrifugation at intervals.它可以用离心法分离.This can be separated by centrifugation.结论: 密度梯度离心法分离获得的人胚胎骨髓间充质干细胞纯度高.Conclusion: High purity of MSC can be obtained by density ...