What was the origin of the oil which now drives our motor-cars and aircraft?
什么是现在的石油驱动的电动汽车和飞机的起源？
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。
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。
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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