《水经注·卷二十九》
潜水发源于巴郡宕渠县，潜水是汉水的分支，通过地下潜流而出，所以叫潜水。
潜水出巴郡宕渠县，潜水盖汉水棱分潜出，故受其称耳。
The Suishui River originates from Dangqu County in Bazhou County. The Suishui River is a tributary of the Han River. It flows out through the underground undercurrent, so it is called the Suishui River.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 潜水出巴郡宕渠县，潜水盖汉水棱分潜出，故受其称耳。 [/INST] The Suishui River originates from Dangqu County in Bazhou County. The Suishui River is a tributary of the Han River. It flows out through the underground undercurrent, so it is called the Suishui River.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 潜水出巴郡宕渠县，潜水盖汉水棱分潜出，故受其称耳。
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The Suishui River originates from Dangqu County in Bazhou County. The Suishui River is a tributary of the Han River. It flows out through the underground undercurrent, so it is called the Suishui River.
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