使下水

They launched a new passenger liner.

他一艘新的客轮下水。

Overpumping groundwater for drinking water and irrigation has caused water levels to decline by tens of metres in many regions, forcing people to use low-quality water for drinking.

过度抽取地下水做为饮用水和用来灌溉在许多地区水位下降几十米，迫用质量较差的水来做为饮水。