And although migration is the only thing which prevents many European populations from shrinking, an influx of outsiders will not change age-structures by much.
虽然吸取移民是唯一的可以阻止欧洲人口缩减的方法，但是流入的外来移民不会对年龄结构产生很大的改变。
The average quantities, average rate of age spcific migration and average age specific population in the four years from 1985 to 1989 can be estimated by using this method.
据此方法可得出1985年到1989年四年间平均按龄迁移量、平均按龄人口数及平均按龄迁移率。
The contents include name, gender, age, nation, nationality, education level, profession, work, migration, social security, marriage, birth, death and housing.
普查登记的主要内容包括：姓名、性别、年龄、民族、国籍、受教育程度、行业、职业、迁移流动、社会保障、婚姻、生育、死亡、住房情况等。
Even assuming that the melting sea ice bring about the above consequence, it doesn't follow that the deer are unable to follow their age-old migration patterns across the frozen sea.
即使假设化冰带来了鹿群不能迁徙的结果。这个假设就承认了一切。
Even assuming that the melting sea ice bring about the above consequence, it doesn't follow that the deer are unable to follow their age-old migration patterns across the frozen sea.
即使假设化冰带来了鹿群不能迁徙的结果。这个假设就承认了一切。
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