... population ecology - 种群生态学 decline in population - 人口减少 life support system - 生命保障系统 ...
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These fish and snails have themselves experienced a decline in population because of overfishing by humans.
由于人类的过度捕捞,这些鱼和蜗牛的数量已经有所下降了。
Secondly, the marriage age in the West is rising, which contributes to the decline in population there.
其次,西方国家结婚年龄在上升,这也促使了人口的下降。
The dynamics vary significantly by region, with some regions, notably Europe, facing the prospects of a rapid decline in population and labor force.
各地区的发展趋势差异很大。有些地区,主要是欧洲地区,面临人口和劳动力急剧减少的前景。
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