Increasing groundwater portion of ditch drainage water is an important way to speed up desalination and salted soil improvement in irrigation areas.

而提高沟排水中地下水排泄量的比例是加快灌区脱盐和盐渍土改良的重要途径。

youdao

Every schoolchild here learns the legend of "the great Yu," whose prodigious feats of canal building and drainage ditch digging 4,000 years ago put an end to killer floods on the Yellow River.

这里的每一个学龄儿童都知道大禹的传说，他的伟大功绩在于4000年前修筑了河渠和排水沟，终止了当时黄河洪水的泛滥。

youdao

Every schoolchild here learns the legend of "the great Yu," whose prodigious feats of canal building and drainage ditch digging 4, 000 years ago put an end to killer floods on the Yellow River.

这里的每一个学龄儿童都知道大禹的传说，他的伟大功绩在于4000年前修筑了河渠和排水沟，终止了当时黄河洪水的泛滥。

youdao

He was headed for the drainage ditch on the other side of the dike.

NEWYORKER: Youth in Revolt

The boy and other family members had sought shelter in a drainage ditch.

NPR: Cleanup Goes On As Storms Move Toward East Coast

Two men and a woman have admitted attacking a student who was robbed, beaten and left for dead in a drainage ditch in Manchester.

BBC: Daniel Whiteley