The duration of marriage is related most obviously to the expectation of life.
很明显，婚姻生活的持续时间与人的预期寿命有关。
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Carol Richardson of confetti. co. uk said: "The research shows just how many components make up the perfect marriage, including the ideal age gap, dating duration and time to get married."
The results showed pregnancy before marriage is related to individuals and boy friends' occupation and educational level, parents'enucational level and love age and duration.