但它告诉我们这个星球是活的，至少从地质上来说。
But it does tell us the planet is still alive, at least in a geologic sense.
从海岸线向大海延伸几英里到几百英里的区域是大陆架慢坡，从地质学上来说，它是大陆的一部分。
From the shore line, out a distance which may be anywhere from a few miles to a few hundred miles, runs the gentle slope of the continental shelf, geologically part of the continents.
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