排水系统

gǎi jìn pái shuǐ xì tǒng

改进排水系统

improve the drainage

pái shuǐ xì tǒng xū yào jīng xì de gòu zào

排水系统需要精细的构造。

The drainage system needs careful construction.

yóu yú jiàng yǔ guò duō pái shuǐ xì tǒng yǐ jīng chè dǐ tān huàn le

由于降雨过多，排水系统已经彻底瘫痪了。

The drainage system has collapsed because of too much rain.