以下为句子列表：
英文: Whichever mating system they follow, the territorial or the harem, all wild equids tend to have their first offspring only after reaching four or five years of age; subsequently, they then reproduce only every other year until the end of their lives at ab
中文: 不管是采用后宫系统或是占领领土的方式来进行交配，所有的野生马都要年满4~5岁才会生下第一胎，接下来则是每隔一年繁殖一次，直到生命结束为止，通常是16岁左右。
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