- These survivors were kept warm by feathers...
这些幸存者靠羽毛保暖 - and were self-sufficient from their first breath...
一出生就能自给自足 - able to live on insects and seeds
以昆虫和种子为食 - and capable of walking within hours.
而且出生之后几小时就能行走 - Sixty-six million years ago,
6600万年前 - birds had become the last remaining branch of the dinosaur family tree.
鸟类成为恐龙族谱中仅存的一支 - From such humble creatures,
从这些不起眼的生物中
and capable of walking within hours. 而且出生之后几小时就能行走
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