The huge difference between their standard of living and ours reflects the difference in the knowledge they could bring to bear on those resources versus what we can.

古人与我们现代人生活水平的极大差导，反映了他们在利用自然资源的知识上与我们的差异。

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The huge difference between their standard of living and ours reflects the difference in the knowledge they could bring to bear on those resources versus what we can.

古人与我们现代人生活水平的极大差导，反映了他们在利用自然资源的知识上与我们的差异。

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