放水的英文：
drainage

She pulled the plug to let out the water.
她拔起塞子放水。

He was accused of having thrown the game.
他被指责故意放水，输掉了这场比赛。

This is a drainage area.
这里是排水区。

Keep the drainage channel clear.
保持下水道畅通。

The defect in the drainage must be remedied.
这排水系统的缺陷该设法补救。

drainage usually has to be undertaken as a first operation
第一步通常采取排水措施。

Pancreatic abscess obviously requires drainage.
胰腺脓肿显然需要引流。