大运河是世界上最长的人工运河。

Dà Yùnhé shì shìjiè shàng zuì cháng de réngōng yùnhé.

The Grand Canal is the longest man-made canal in the world.

这条运河连接了南方和北方的城市。

Zhè tiáo yùnhé liánjiē le nánfāng hé běifāng de chéngshì.

This canal connects cities in the south and the north.

古时候人们靠运河运输粮食和货物。

Gǔ shíhou rénmen kào yùnhé yùnshū liángshi hé huòwù.

In ancient times, people relied on canals to transport grain and goods.