There will always be some slight difference in the electrical characteristics or in the timing.
这是因为在电子特征方面或在时间统计上总会有一些轻微区别。
Conclusion: Dipsacus is a natural class group, and the slight difference of its pollen grains is useful to some extent in the division of species.
结论：续断属为一自然分类群，花粉粒的细微差异对种的划分有一定意义。
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