板块构造论认为，地球表面由十来个巨大的地壳板块构成，漂浮在浩瀚如海的部分熔岩上。
The theory of plate tectonics holds that the surface of Earth is composed of a dozen or so huge crustal slabs that float on a sea of partially molten rock.
板块构造论认为，地球表面由十来个巨大的地壳板块构成，漂浮在浩瀚如海的部分熔岩上。
The theory of plate tectonics holds that the surface of Earth is composed of a dozen or so huge crustal slabs that float on a sea of partially molten rock.
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