The fertility rate is the number of children a woman can expect during her lifetime; 2.1 is the replacement level, the point at which the population stabilises.

人口出生率是指女性一生预期生养的儿童数目；2.1是更替水平，人口在这一点上保持稳定。

youdao

That number, the so-called replacement rate, is usually taken to be the level at which the population eventually stops growing.

1被称作是替换率，这通常被作为人口最终会停止增长的生育率水平。

youdao

The reason is that widening replacement-level fertility means population growth is slowing down anyway.

理由是生育等值交换水平的扩展表明人口增长不论怎样还是在减速。

youdao

The reason is that widening replacement-level fertility means population growth is slowing down anyway.

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In China and most of the industrialised world, births and deaths are at or below replacement level (though America's population still rises because of immigration).

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Still, because the current level is far below the level of 2.07 required to prevent population replacement, the result is net decline.

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