Holderness says that knowledge becomes crucial with the world population expected to reach nine billion in less than 40 years.
Holderness表示，由于不到40年的时间里世界人口将达到90亿，这些知识将非常关键。
Holderness says that knowledge becomes crucial with the world population expected to reach nine billion in less than 40 years.
Holderness表示，由于不到40年的时间里世界人口将达到90亿，这些知识将非常关键。
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