库容

zhè ge guó jiā de shuǐ kù xù shuǐ liàng yǐ jiàng zhì dī yú qí kù róng liàng de bǎi fēn zhī wǔ shí

这个国家的水库蓄水量已降至低于其库容量的百分之五十。

The water content of the country's reservoirs had fallen to less than 50% of their capacity.