3 sentences

1. 没人比你丈夫更熟悉下水道！

   méi​rén bǐ nǐ zhàng​fu gèng shú​xī xià​shuǐ​dào!

   No one knows the sewers better than your husband!

   Source: OpenSubtitles

2. 罗马人还修建过下水道来收集雨水和污水。

   luó​mǎ​rén hái xiū​jiàn guo xià​shuǐ​dào lái shōu​jí yǔ​shuǐ hé wū​shuǐ.

   The Romans also built sewers to collect rainwater and sewage.

   Source: CCMatrix

3. 我们正在把我们的环境变成一个开放的下水道。

   wǒ​men zhèng​zài bǎ wǒ​men de huán​jìng biàn​chéng yī​ge kāi​fàng de xià​shuǐ​dào.

   We are turning our environment into an open sewer.

   Source: CCMatrix