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- 你查询的单词是：subsoil （[ 'sʌbsɔil ]）
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- 解释： n. 下层土,底土
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- 例子： 1. Permanently frozen subsoil, occurring throughout the Polar Regions and locally in perennially frigid areas.
永冻土永久冰冻的下层土壤，出现在整个北极地区和部分长期寒冷的地区
2. A specific layer of soil or subsoil in a vertical cross section of land.
地层，岩层处于土地的垂直横截面中的某一具体土层或次土层
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