而在自然历史博物馆里，分类学家至今还能从保存的标本里发现尚未命名的标本。
Taxonomists at work in museums of natural history still find as yet unnamed specimens among the collections of preserved specimens.
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.
我曾经在博物馆看见过一些保存了超过100年的标本。
I saw some specimens in museum collections that are over 100 years old.
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