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鸽子有一习性:单独饲养的母鸽不会下蛋,它一定要看得见别的鸽子才会下蛋。这是因为鸽子独居时卵巢不会发生作用。不过鸽子主人想要鸽子
The pigeon has a habit: the hen raised alone will not lay eggs, it must see the other pigeons will lay eggs. This is because the ovaries will not function when the pigeons live alone. But the pigeon owner wants a pigeon