City growth far outran the general population boom.

城市的发展大大超过总的人口激增。

Introduced species can often undergo a population boom just after introduction.

被引进的物种在刚被引入之后往往会发生数量暴增。

Family planning experts worry in particular about the looming population boom in sub-Saharan Africa.

计划生育专家尤其担心撒哈拉以南非洲地区的人口激增问题。

But officials have resisted any major policy changes out of fears that a major population boom might follow.

但官方不想作出任何重大的政策变动，因为担心接着会出现大的人口出生潮。

Senior officials fear that any change would unleash a population boom, despite predictions to the contrary by most experts.

高级官员担心，任何改变都会让人口迅速增长，尽管这与大多数专家预测的相反。