Not only have they been known to kill and maim their own young, they also kill porpoises and play with their dead carcass for no apparent reason other than its fun.
不仅人们已经发现的他们杀害和弄残他们的幼仔，它们还会杀死鼠海豚，玩弄鼠海豚的尸体，并且毫无理由，似乎只为了玩耍。
Not only have they been known to kill and maim their own young, they also kill porpoises and play with their dead carcass for no apparent reason other than its fun.
不仅人们已经发现的他们杀害和弄残他们的幼仔，它们还会杀死鼠海豚，玩弄鼠海豚的尸体，并且毫无理由，似乎只为了玩耍。
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