English Plate Tectonics
七大洲介绍
板块运动，
火成岩igneous rocks
变质岩metamorphic rock
沉积岩sedimentary rocks
Earthquake video
Earthquake
Earthquake
Volcanos
Volcanos
Volcanic eruption explained
20-21 G4
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English Plate Tectonics
七大洲介绍
板块运动，
火成岩igneous rocks
变质岩metamorphic rock
沉积岩sedimentary rocks
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