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单词 therians
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PBS地球-动物趣闻

These were the therians, like Juramaia, a toothy, shrew-like mammal known from China.

这些是兽类动物,例如 Juramaia,一种长满牙齿、长得像鼩鼱的哺乳动物,在中国广为人知。

PBS地球-动物趣闻

What's interesting about syncytins is that they didn't evolve in mammals; they've been part of our genomes since before therians were even a thing.

合胞素的有趣之处在于它们不是在哺乳动物中进化而来的;在兽人出现之前, 它们就已经是我们基因组的一部分了。

PBS地球-动物趣闻

Another idea is that therians followed a path similar to the monotremes, where eggs were retained in the mother's body for longer and longer periods of time.

另一个想法是, therians 遵循类似于单孔类动物的路径,卵子在母亲体内的保留时间越来越长。

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