| 单词 | 前齿 |
| 释义 | 〔beaver〕A large aquatic rodent of the genusCastor, having thick brown fur, webbed hind feet, a broad flat tail, and sharp incisors adapted for gnawing bark, felling trees, and constructing dams and underwater lodges. 海狸，河狸：一种大的海狸属 水栖啮齿目动物，有着厚密的褐色毛皮、长蹼的后脚、宽平的尾巴和适合于咬树皮、弄倒树、建水坝及水下巢穴的尖锐前齿 〔rodent〕Any of various mammals of the order Rodentia, such as a mouse, rat, squirrel, or beaver, characterized by large incisors adapted for gnawing or nibbling.啮齿目动物：任一种有适于啃或咬的大前齿的啮齿目哺乳动物，如鼠、大家鼠、松鼠或狸 |
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