Underdrain

[ʌndәdrein]

解释:

(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.

编辑:路易斯

解释:

v.t. same as Underditch.—Also n. Un′derdrain.

手打:撒迪厄斯