population doubling meaning in English

群体倍增数

( 2 ) drawing the cell growth curves , and calculating the population doubling time
（ 2 ）绘制细胞生长曲线，计算细胞群体倍增时间。
When ferries , packed with sightseers and holiday - makers arrive at the island , the population doubles
旅客和游人纷纷涌至，令小岛人山人海，好不热闹！
The county now has a population of 33 , 000 , and for honesty , intelligence , and enterprise its citizens are unrivalled , " the directory noted . the county s population doubled between 1880 and 1890 and dallas was called the wealthiest and most populated county in texas
李察逊市内的中国城历史最老的一家华人商号是座落于greenville街与polk街目前仍在营业的顶好超级市场，乃于一九八一年由越南侨商所开设的。