| 单词 | 树洞 |
| 释义 | 〔box〕A hollow made in the side of a tree for the collection of sap.树孔：为收集树汁而挖的树洞〔sawyer〕Any of several long-horned beetles of the genusMonochamus having larvae that bore large holes in living or dead wood. 天牛：任一种独角属 长角甲虫，其幼虫栖于活树及朽木上的树洞里 |
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