Ruth Heller shows how snakes , turtles , and other interesting reptiles are experts as camouflage.
找找看,你找得到书中所有的爬虫类动物吗?
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含鳖精、蛇精的保健食品,有助于强身益寿.
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The constant writhing of the snakes can even propel the ball over rocks and tree roots.
他们持续的扭动可驱使球体越过岩石和树根.
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