Female turtles have also become smaller on average; bigger individuals have been removed from the wild population and the overall life expectancy of the species has fallen.
雌龟的平均体型变小了；较大的个体已经从野生种群中消失，并且整个物种的预期寿命都已经下降。
But in Nunavut, for example, alcoholism and suicide rates are higher than the national average, life expectancy is lower and almost half of the population lives in overcrowded housing.
但是，比如因努伊特（Inuit）的酒精中毒和自杀的比率却高过加拿大平均水准，预期寿命相对较短，而且超半数的人口都生活在拥挤的住房内。
The retiring age is determined by the average life span of population of the whole country and the conditions of labors supply and demand.
退休年龄由各国各地人口的平均寿命以及劳动力供求状况所决定，它对养老金的支付有重要影响作用。
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