By contrast, the total human population on Earth was no more than a few million until a few thousand years ago.
相比之下，直到几千年前为止，地球上的人口不过区区数百万。
In my father's lifetime, the world's population went from 2 billion to 6 billion-so my father was alive for a tripling of the total human population.
在我父亲的有生之年里，全球人口从20亿增长到了60亿，他是作为这翻了三番的人口中的一员而活在这个世界上的。
Urbanization, the urban population accounts for the increasing proportion of the total population trends, is becoming one of the most important features of the progress of human society.
城市化是城市人口占全部人口的比重不断增加的趋势，正在成为人类社会进步的最主要特征之一。
The first of these criticisms is based on the assumption that a total increase in human population is in itself a menace, tending to lower standards of living and to aggravate international rivalries.
第一个理由是人口之增多本身就是一种危险，因为人口增多足以减低一般人之生活程度，催促国际之斗争。
Among the influences mentioned above, temperature is the main natural factor that influences the wetland changes, and total population changes and food production are the main human activity factors.
其中，气温升高是主要的自然影响因素，总人口变化和粮食生产是主要的人类活动影响因素。
The total combined weight of the world's ant population is heavier than the weight of the human population.
全世界的蚂蚁的体重加起来比全世界的人的体重加起来还多。
The total combined weight of the world's ant population is heavier than the weight of the human population.
全世界的蚂蚁的体重加起来比全世界的人的体重加起来还多。
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