The rocks in which oil is found are of Marine origin too.

石油存在处的岩石也都有海洋的渊源。

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The rocks in which oil is found are of marine origin too.

发现 石油的岩石以前也是在海中的。

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This report reviews the literature on indole alkaloids of marine origin and also highlights our own research.

本文综述了有关海洋来源的吲哚生物碱的文献，同时也包括了我们自己的研究。

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The second theory considers the origin to be in water, from marine reptiles.

BBC: Studying how snakes got legless