The research work consequently experienced geosyncline theory period and plate tectonics theory period.
以后的研究经过了地槽理论阶段和板块构造理论阶段。
The theory of plate tectonics is the division of palaeo-plates.
板块构造理论是古板块分区的基础。
What does the theory of plate tectonics maintain?
这板块构造学说的理论讲些什么？
What does the theory of plate tectonics maintain?
这板块构造学说的理论讲些什么？
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