Whatever evolutionary benefit exists to the swamp wallaby's unusual reproductive strategy remains to be seen.

黑尾袋鼠不寻常的繁殖策略在进化上有何好处，尚有待观察。

But unlike their close relatives, pregnant swamp wallabies mate again a day or two before they give birth.

但与其近亲不同的是，怀孕的黑尾袋鼠在临产前一两天会再次交配。

Picture a small kangaroo. You're basically seeing something very much like the Australian marsupial called the swamp wallaby.

想象一只小袋鼠。你想到的可能非常接近名为黑尾袋鼠的澳大利亚有袋类动物。

You're basically seeing something very much like the Australian marsupial called the swamp wallaby.

你基本上看到的是一种非常像澳大利亚有袋动物的东西，叫做沼泽小袋鼠。

" And so, for the first time we were able to actually prove that the swamp wallaby is pregnant its whole life. It's never not pregnant."

“因此，我们第一次能够证实黑尾袋鼠整个一生都在怀孕。没有不怀孕的时候。”

This revolving cycle of pregnancy means that after a female swamp wallaby gives birth to her first baby from one uterus, a second embryo lies dormant in her other uterus, while the first baby attaches to a teat within her pouch.

这种循环的怀孕周期意味着在一只雌性沼泽袋鼠从一个子宫生下她的第一个孩子后， 第二个胚胎在她的另一个子宫中处于休眠状态，而第一个婴儿则附着在她育儿袋中的一个奶头上。