虽然不常遇见，巨蝮却是带有致命毒液的危险动物。
Though seldom encountered, the bushmaster is potentially lethal.
蝮蛇一科成员众多，其中包括鼎鼎有名的铜头蝮、响尾蛇和食鱼腹。
The group of snakes known as pit vipers includes well-known species such as the copperhead, the rattlesnake, and the water moccasin.
蝮亚科（pitvipers）起源于中国，是通过连接西伯利亚东北部与阿拉斯加的古陆桥而扩散到美洲的一大类高等的毒蛇。
The pit vipers are a large group of advanced venomous snakes that evolutionarily arose in china but spread to the new world across an ancient land bridge connecting northeastern siberia with alaska.
蝮亚科（pitvipers）起源于中国，是通过连接西伯利亚东北部与阿拉斯加的古陆桥而扩散到美洲的一大类高等的毒蛇。
The pit vipers are a large group of advanced venomous snakes that evolutionarily arose in china but spread to the new world across an ancient land bridge connecting northeastern siberia with alaska.
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