腰椎间盘疝出因为正常年龄增长导致退行性改变而发生。

Lumbar disc herniations are most frequently caused by degeneration due to the normal aging process.

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还有研究显示，年龄较大的男人生育患有唐氏综合征婴儿的几率是正常年龄生育的父亲的四倍。

And studies show that older men with down syndrome baby birth as likely as the normal age four times the father's family.

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受益于“家庭津贴计划”家庭中的儿童拥有正常年龄别身高的可能性比比那些未受益于该计划家庭中的儿童要大26%；该差异同样适用于年龄别体重。

Children from families exposed to the BFP were 26% more likely to have normal height for age than those from non-exposed families; this difference also applied to weight for age.

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