The basic reason of dual economy lies in the difference between division organization and its evolution path.

二元经济产生的根本原因在于分工组织及其演进路径的差异。

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The division of labor of hand and foot, it is a milepost of human evolution.

手与脚的分工，是人类进化的一个里程碑。

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All these studies on solving the unity of stratigraphic division and correlation and the evolution of sedimentary facies in time and space in whole of South China Sinian is of significance.

这些研究对解决整个南方震旦纪地层划分对比的统一及沉积相的时空演化具有重要意义。

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Research reveals only a modest evolution in the division of household labor over the past 18 years -- mainly in the realm of child care, with more dads stepping up.

CNN: Why husbands who share household chores miss out on sex