考拉属喜夜间活动的、于树上的有袋类哺乳动物。
DNA证据显示，真兽类和有袋类最后的共同祖先生活在1.6亿年前左右。
DNA evidence has suggested the last common ancestor to eutherians and marsupials lived around 160 million years ago.
经理打开字典，查到了熊猫的定义： ：“一种住在树上的有袋类亚洲动物，以分明的黑色和白色皮毛为特征。
Thee manager opens his dictionary and sees the following definition for panda: "A tree-dwelling marsupial of Asian origin, characterised by distinct black and white colouring."
尽管我们时常称考拉为“树袋熊”，其实考拉是有袋类哺乳动物，跟熊完全没关系，只是看起来萌萌的像泰迪熊罢了。
Although they are commonly called koala "bears," koalas are marsupials and have nothing at all to do with bears, except that they are cute like a teddy bear.
这些部分的特征让古生物学家得以作出这样的结论：这种动物在哺乳动物谱系中，与有胎盘类的关系较与有袋类(如袋鼠)的关系更接近。
These features led the paleontologists to conclude that the animal was closer to living placentals on the mammalian family tree than to pouched marsupials, such as kangaroos.
短尾矮袋鼠是种有袋类哺乳动物，看起来就好像是迪士尼里的卡通形象一样，而它实际上是澳大利亚西南角一小块区域的一种特有动物。
Meet the Quokka, a marsupial that seems to have come straight from an animator at Disney, but is actually native to a small corner of south western Australia.
短尾矮袋鼠是种有袋类哺乳动物，看起来就好像是迪士尼里的卡通形象一样，而它实际上是澳大利亚西南角一小块区域的一种特有动物。
When it comes to cute animal pictures, there's no beating this cheeky creature, who may as well have wandered straight out of a feel- good kids' movie.
按照我们的分类标准，仅是本世纪的头十年，我们就发现了大约300种哺乳动物新物种——大部分是啮齿类，也有有袋类，突吻鲸类以及大量的灵长类动物。
Even within our own class, mammals, roughly 300 new species have been discovered in the first decade of this century-mostly rodents, but also marsupials, a beaked whale and a slew of primates.
按照我们的分类标准，仅是本世纪的头十年，我们就发现了大约300种哺乳动物新物种——大部分是啮齿类，也有有袋类，突吻鲸类以及大量的灵长类动物。
Even within our own class, mammals, roughly 300 new species have been discovered in the first decade of this century-mostly rodents, but also marsupials, a beaked whale and a slew of primates.
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