如果上述说法有道理，为什么不在世界各地都减少人口呢？
And if that makes sense, why not start cutting population everywhere?
随着经济发展，贫困人口数量正在减少。
The number of poor men is on the decrease as the economy is growing.
一片片土地荒芜，人口减少。
其一是大家熟知的低出生率和人口减少的地区。
One is the familiar place of low fertility and population decline.
俄罗斯现在的人口已经比1991年时减少了700万。
Russia's population is already 7 million below what it was in 1991.
巴西的绝对赤贫人口减少了一半。
人口增加和耕地减少的矛盾日益突出。
There is obvious conflict between population growth and agricultural land reduction.
这个城市的人口由于黑死病而减少了。
The population of the city was thinned out by the black death.
随着对人口需求的降低，人口数量的减少也是合理的。
It is rational for human populations to decrease as there is less need for them.
这个城市的人口在不断减少。
There has been a steady decrease in population in this city.
提高人口素质，减少出生缺陷。
Objective:To improve the health of the people, reduce the birth defect.
这个城市的人口正逐渐减少。
该村的人口已经减少了。
疾病使人口减少了。
但是由于当地人口的捕食，它们的数目不断减少。
Their Numbers keep dwindling, as some of the local people hunt them for food.
在中国，人口是否是减少了？
在中国，人口是否是减少了？
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