underdrain
'ʌndәdrein
基本解释
n. 阴沟, 地下沟道, 盲沟, 暗渠
英文释义
n. An underground drain or trench with openings through
which the water may percolate from the soil or ground above.
v. t. To drain by forming an underdrain or underdrains in;
as, to underdrain land.
上一个单词：underdrag
下一个单词：underdrainage