📣 终于看懂都江堰的原理了，古人太伟大有智慧了‼️👍👍👍 https://t.co/SL70gEmcDE https://video.twimg.com/amplify_video/1845774134938136592/vid/avc1/1920x1080/k3FOEe8lvimFODHA.mp4?tag=16
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