1 sentence

1. 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