Out-of-control population growth and an endless exodus to the northn Net emigration is down to zero, if not negative, and the fertility rate will soon be lower than that of the United States.

那个“人口增长失控，大量人群北迁”的墨西哥也已不复存在——墨西哥的净移民数（出境移民减去入境移民的结果，译者注）不计负数已减少至零，其出生率也即将低于美国。

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"Poverty has stunted 4 further growth in Internet users, which has kept the Net user population to around 50 percent, " Li said.

李亦表示：“贫困阻碍了网民数量的进一步增加，使得网民数量占全部人口的比例只在50%左右。”

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Both temperature and sibling species affected markedly the net reproductive rate and intrinsic rate of population growth, but their interactions did not appear to be significant.

温度和姐妹种对轮虫的净生殖率和种群内禀增长率均有极显著影响，但两者的交互作用对其无显著性影响。

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In that spell, the old have accounted for more than 90% of Lichfield's net population growth.

ECONOMIST: Why the old are moving inland

What's seldom mentioned is that almost all of America's net population growth is driven by immigration.

CNN: What's the value of immigration?

Family planning and urbanisation have reduced net population growth from 2.8% a year in the 1980s to 2.1% today.

ECONOMIST: Slow, quick, quick, slow are the dance-steps of reform