Legs on snakes likely disturbed some form of movement, such as burrowing, rendering the legs useless.
蛇的腿可能打扰了它的某些活动，比如，掘穴，逐渐就表现的没有用处了。
Growing to about a foot (30 centimeters) long, blind snakes act a lot like worms, burrowing under the surface of every continent except Antarctica.
除了南极洲，在地球上的其他各大洲都可以见到盲蛇。 它们钻入土壤中，就像一条蠕虫一样，而它们的身长也只能达到一英尺（30厘米）。
Some believed that snakes evolved on land, and that their ancestors were small, burrowing lizards.
一些科学家认为蛇从陆地上进化而来，它们的祖先是小的，穴居的蜥蜴。
Some believed that snakes evolved on land, and that their ancestors were small, burrowing lizards.
一些科学家认为蛇从陆地上进化而来，它们的祖先是小的，穴居的蜥蜴。
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