而我国古代著名水利工程如灵渠、都江堰等，历经两千余年，至今仍然发挥作用，其中必定有宝贵的经验和教训。
On the other hand, some Chinese ancient famous projects such as Lingqu Canal and Dujiang Dam have been 2000 years, and are still on working.
郭守敬是中国古代著名的水利工程师和数学家。
He is a famous ancient Chinese hydraulic engineer and mathematician.
都江堰是我国著名的古代水利工程。
Dujiangyan Irrigation project is one of the most famous projects in China.
都江堰是我国著名的古代水利工程。
Dujiangyan Irrigation project is one of the most famous projects in China.
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