Naturalists compare forest to human's lungs.

生态学家把森林比作人类的肺。

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There had been French naturalists through the area, but no one believed the tales.

曾有一些法国自然学家到过这个地方，但没有人相信这些传说。

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There had been French naturalists through the area, but no one believed the tales.

曾有一些法国自然学家到过这个地方，但没有人相信这些传说。

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