Whatever the original purpose of feathers, they were probably around for millions of years before a single lineage of dinosaurs began to use them for flight.

不管羽毛进化的起初目的是什么，总之它们又经历了上千万年的时间才承载着某支恐龙谱系开始翱翔于蓝天。

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Here we present a computational method forthe derivation of a lineage tree from single-cell tranome data.

这项工作重，我们提出了一个“从单细胞转录组数据计算和推导细胞谱系树的算法”。

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