If you are trying to manage it, you must first divide your area of concern into drainage basins.

如果你想要操控水，你必须先把那些你所关注的地区划分成一个个地势上的盆地。

youdao

If you are trying to manage it, you must first divide your area of concern into drainage basins.

如果你想要操控水，你必须先把那些你所关注的地区划分成一个个地势上的盆地。

youdao