力能学：研究能量的流动及转变的学科。
Energetics: the study of the flow and transformation of energy.
人口社会学人口社会学本文是对城市流动妇女家庭地位的一项探索性研究。
This article is an exploring research on the family status of floating women in city.
人口社会学人口社会学本文是对城市流动妇女家庭地位的一项探索性研究。
This article is an exploring research on the family status of floating women in city.
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