求翻译：研究表明，石油的生成至少需要200万年的时间是什么意思？

Studies have shown that the oil generated at least 200 million years

Research has shown that oil needs to be generated at least 2 million years of time

The research indicated that, the petroleum production needs at least 2,000,000

Studies have shown that oil needs at least 2 million years ' time

At present the petroleum is the modern industry society most important raw material.The overwhelming majority transport means use petroleum actuation, the petroleum also is used in addition for to generate electricity, it also is chemical industry important raw material.Many countries have combat re