Britain places a disappointing 26th, down four places from a year ago, reflecting in particular a relatively low mean number of years of schooling for its population.
英国排在令人失望的第26位，比一年前下降4位，相对应的尤其是其人口的一个相对较低的受教育时间。
The death and reproduction of the population make the mean density fluctuate but do not obviously change the overall level of population number and the population structure.
种群的死亡过程和繁殖过程使种群平均密度有较明显的波动，但对种群总体水平无明显影响，种群结构也无明显变化。
The mean number of alleles per microsatellite locus (1.89) in BC population was considerably lower than that (2.44) in RBC population.
平均每个微卫星位点在红鳙群体和普通鳙鱼群体中检测到的平均有效等位基因数分别为2.44和1.89。
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