plate tectonics

noun

🔊/ˌpleɪt tekˈtɒnɪks/

🔊/ˌpleɪt tekˈtɑːnɪks/

[uncountable] (geology地质学)

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the movements of the large sheets of rock (called plates) that form the earth’s surface; the scientific study of these movements板块运动；板块构造学；大地构造学