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...
It was with some trepidation that I viewed the prospect of cycling across Uganda.我带着些许惶恐考虑了一下骑自行车周游乌干达的可能性。" Thank you,'she answered, with some trepidation and went out.“ 谢谢, " 她说着胆战心惊地走了出来.The men set off in fear a...