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.
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