常见例句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.板塊搆造論認爲，地球表麪由十來個巨大的地殼板塊搆成，漂浮在浩瀚如海的部分熔巖上。 返回 crustal plate