某些物种可能会变得非常稀少。
世界上35种海马中大多数的种群数据都非常稀少。
Population data for most of the world's 35 seahorse species is sparse.
这些古老蛇类的化石标本非常稀少,仅有的三个标本的后肢保存完好并可见。
There are few known fossil specimens of these ancient snakes and only three in which the hind limbs are preserved and visible.
One reason is that they're present in very small numbers.
一个原因就是它们的数量非常稀少
Hair cells that are inside your brain are very scarce.
毛细胞非常稀少。
Now, in the process of doing that they found some very rare stem cells that are called pluripotent, pluri just means many potencies.
如今在这种研究进行的过程中,他们发现了一些非常稀少的干细胞,称为多能干细胞,pluri这个前缀就是指很多能力
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