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

Since the intensification of urbanization, it not only brought great economic benefits, but also the population explosion, excessive building density, terrible traffic jam, and other problems.

城市化进程的不断加剧，在产生巨大经济效益的同时，也带来了城市人口膨胀、建筑密度过大、交通严重堵塞、环境持续恶化等一系列的问题。

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