Right now, people are using the fourth generation bio-fuels.

如今，人们正在使用第四代生物能源。

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Since then, more and more people talk about Bio fuels.

自此，越来越多的人开始谈论生物燃料。

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Since then, more and more people talk about Bio fuels.

自此，越来越多的人开始谈论生物燃料。

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