Additional social stresses may also occur because of the population explosion or problems arising from mass migration movements—themselves made relatively easy nowadays by modern means of transport.

由于人口的猛增或大量人口流动（现代交通工具使这种流动相对容易）造成的种种问题也会对社会造成新的压力。

youdao

Some of the population explosion is explained by the extension of Roman citizenship to various groups, but far from all of it.

人口大爆炸的一种解释是罗马公民权利扩大到了各种团体，然而这不太可信。

youdao

With the population explosion in the city and decrease of land resources, using land in stereoscopic form has become a general trend all over the world.

随着城市人口的快速增长和土地资源的日趋稀缺，以立体方式利用土地，已成为世界范围的普遍趋势。

youdao

They are known as Asian Carp and the explosion of their population in the Illinois River is a concern to large-river ecologist Kevin Irons.

VOA: standard.2010.07.20

But he pooh-poohs any suggestion that global warming might have something to do with the population explosion.

BBC: Parakeet in a London garden

Ehrlich insisted that commodities would become more expensive: they were running out in the face of the population explosion.

FORBES: But Why Did Julian Simon Win The Paul Ehrlich Bet?

Is the human population explosion a mere pretext for biological profiteering?

FORBES: A Call to Agricultural Action