基本解释地下排水溝，鼠道式排水溝英英字典柯林斯英英字典 an underground cylindrical drainage channel cut by a special plough to drain heavy agricultural soil mole drain剑桥字典mole drain柯林斯字典专业释义土木建築工程鼠道式排水溝地下排水溝機械工程地下排水溝