《徐霞客游记·盘江考》
后来我到云南省城，经过杨林所时，看见杨林所北面有一个特别巨大的湖泊，古代称为嘉利泽，北边形成大溪，流出河口。
后余至云南省城，过杨林，见北一海子特大，古称嘉利泽，北成大溪，出河口。
Later when I arrived at the provincial capital of Yunnan Province, as I passed by Yanglinsuo, I saw a particularly large lake to the north of Yanglinsuo, called Jialize in ancient times. Forming a large stream to the north, it flows out of He Kou.
<s>[INST] Kindly elucidate the central themes in this passage in English: 后余至云南省城，过杨林，见北一海子特大，古称嘉利泽，北成大溪，出河口。 [/INST] Later when I arrived at the provincial capital of Yunnan Province, as I passed by Yanglinsuo, I saw a particularly large lake to the north of Yanglinsuo, called Jialize in ancient times. Forming a large stream to the north, it flows out of He Kou.</s>
Kindly elucidate the central themes in this passage in English: 后余至云南省城，过杨林，见北一海子特大，古称嘉利泽，北成大溪，出河口。
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Later when I arrived at the provincial capital of Yunnan Province, as I passed by Yanglinsuo, I saw a particularly large lake to the north of Yanglinsuo, called Jialize in ancient times. Forming a large stream to the north, it flows out of He Kou.
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