Topographically, we may consider the coastal plain to be a terrestrial analog of the continental shelf.

从地形角度讲我们可以把沿岸平原看成是大陆架在陆上的类似构造。

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The continental shelf is a natural extension of the mainland, the original for the coastal plain, the latter due to sea-level rise only after indulging in underwater and become shallow.

大陆架是大陆的自然延伸，原为海岸平原，后因海面上升之后，才沉溺于水下，成为浅海。

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