Still others suggest the short or sometimes nonexistent legs of the 800 species of skinks are clues to where limbless snakes originated.
也有科学家认为，800种小蜥蜴的短小的有些甚至了退化的四肢提供了蛇起源的线索。
Still others suggest the short or sometimes nonexistent legs of the 800 species of skinks are clues to where limbless snakes originated.
也有科学家认为，800种小蜥蜴的短小的有些甚至了退化的四肢提供了蛇起源的线索。
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