在电影《冰原历险记2》中，一对猛犸配偶显示了它们的力量：公猛犸从即将塌陷的山洞里救出了母猛犸。
In Ice Age 2, the mammoth couple showed off their power, with the male saving the female from a damaged cave.
在我抵达那里的几天之后，一只母牛在生产一对小牛时不幸过逝了，牠们是一对公与母的小牛。
A few days after my arrival there, a cow died giving birth to twin calves, one male and one female.
短尾矮袋鼠的体型与弗吉尼亚负鼠相差无几，但负鼠幼崽的哺育期是短尾矮袋鼠幼崽的三倍长，且公负鼠与母负鼠对每只幼崽的照料也更多。 负鼠的脑袋是短尾矮袋鼠的两倍大。
Quokkas are about the same size as Virginia opossums, but baby quokkas nurse for three times as long, their parents invest more in each baby, and their brains are twice as big.
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