《水经注·卷三》
这条水发源于东山脚下，北方俗称吐文水，山也叫吐文山。
水出东山下，北俗谓之吐文水，山又取名焉。
This tributary originates from the eastern foot of the mountains, commonly known as the Tuwenshui River in the north, and the mountains are also called the Tuwen Mountains.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 水出东山下，北俗谓之吐文水，山又取名焉。 [/INST] This tributary originates from the eastern foot of the mountains, commonly known as the Tuwenshui River in the north, and the mountains are also called the Tuwen Mountains.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 水出东山下，北俗谓之吐文水，山又取名焉。
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This tributary originates from the eastern foot of the mountains, commonly known as the Tuwenshui River in the north, and the mountains are also called the Tuwen Mountains.
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