Because of China's big population base, the contradiction of the supply of labor force exceeding the demand will exist for a very long time to come. 由于中国人口基数大，劳动力供大于求的矛盾将在一个很长时期内存在。
They maintain that the population base used to give frequency statistics must be drawn from the suspect's particular gene pool. 他们声称用于频率统计的人口基数必须从嫌疑犯的特定基因库中获得。
