Statistics suggest that the population of this country will be double in ten years' time.
统计显示，这个国家人口在10年内将增加一倍。
The population of Congo, now 70m, will double in that time.
目前拥有七千万人口的刚果到那时将面对翻一番的人潮。
She collected statistics which proved that the death rate for young soldiers in peace time was double that of the normal population.
她根据收集的统计数据证明在和平时期年轻士兵的死亡率是普通人的两倍。
World population increases sharply and double time shortens greatly.
世界人口数量急剧增长，人口倍增时间大为缩短。
Its net reproductive rate, the intrinsic rate of increase and the increment rate per unit were high, but its generation span and the time of double population size were low.
种群的净增殖率、内禀增长率及周限增长率较高，而种群的世代周期及加倍时间偏低；
Its net reproductive rate, the intrinsic rate of increase and the increment rate per unit were high, but its generation span and the time of double population size were low.
种群的净增殖率、内禀增长率及周限增长率较高，而种群的世代周期及加倍时间偏低；
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