据推算，世界人口在2050年将要增加一倍。

It has been calculated that the world's population will double by 2050.

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注：本表为人口变动情况抽样调查推算数。

Note:The data in this table is estimated by the Population Sample Survey.

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注：本表为人口变动情况抽样调查推算数。

Note:The data in this table is estimated by the Population Sample Survey.

youdao