But which four-legged relatives and their family traits led the transition for legless snakes?
但是，哪种具有四肢的近亲及其特征导致了向无四肢的蛇的进化呢？
A new species of blind, legless lizard has been found in the mountains of Cambodia, conservationists announced.
环保人士宣布：在柬埔寨山区发现新物种——一种无视力，无脚的蜥蜴。
The slow-worm is in fact not a snake but a legless lizard.
蛇蜥其实不是蛇，而是无脚的蜥蜴。
The slow-worm is in fact not a snake but a legless lizard.
蛇蜥其实不是蛇，而是无脚的蜥蜴。
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