The best way to represent the isotactic structure is with molecular models.表示等规结构的最好方法是用分子模型.Polyacetaldehyde may exist in atactic, syndiotactic and isotactic forms.聚乙醛可以以无规, 间同和全同形式存在.Polyacetadehyde may exist in atacti...
Scientific opinions are not carved on tablets of stone; they change over the years.科学观点并非一成不变;它们随着时间而改变。...the different challenges of their career, their need to change, to evolve, blah blah blah.他们的职业面临的各种不同的挑战,需要求变,需要...