The researchers looked at men and women who did not change their partners between the birth of their first and last child and found the age difference among couples that produced the most offspring.
研究人员关注那些在他们的第一个孩子和最后一个孩子出生之间没有改变伴侣的男性和女性，然后发现了有最多子女的伴侣间的年龄差异。
This paper also analyzes the consequences of marriage squeeze in the three aspects of proportion of lifetime unmarried, age of first marriage, and age difference between the couples.
本文从终身不婚比例、初婚年龄和夫妇年龄差三个方面对于婚姻拥挤的后果进行了分析。
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