The ocean, however deep and however vast, still has its limits and scope.
海洋,无论如何深邃辽阔,依然有其极限和范围。
However, plate tectonics cannot fully explain certain massive surface features, such as the "superswell" of southern Africa, a vast plateau over 1,000 miles across and nearly a mile high.
然而,板块构造不能完全解释某些巨大的地表特征,例如非洲南部的“superswell”,即一个直径超过1000英里、高度接近1英里的巨大高原。
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