| 单词 | underdrain |
| 释义 | underdrain n. /un"deuhr drayn'/; v. /un'deuhr drayn"/, n. 1. a drain placed beneath the surface of cultivated fields, streets, etc. v.t. 2. to equip or supply with an underdrain or underdrains. [1795-1805; UNDER- + DRAIN] |
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