过去分词：underdrained 现在分词：underdraining 第三人称单数：underdrains
1.阴沟,暗渠,地下沟道
1.用暗渠排去(...处)的水
1.an underground drain or system of drains on agricultural land
1.to equip an area, especially cultivated land, with a system of underground drains
underdrainsunderdrainsunderdrains