《徐霞客游记·楚游日记九》
州城西南，山冈山坡起伏不平，修筑道路时便顺着地势。
州西南冈陀高下，置道因之。
The hills and slopes to the southwest of the prefecture city are undulating, and the roads were built to follow the terrain.
<s>[INST] Kindly elucidate the central themes in this passage in English: 州西南冈陀高下，置道因之。 [/INST] The hills and slopes to the southwest of the prefecture city are undulating, and the roads were built to follow the terrain.</s>
Kindly elucidate the central themes in this passage in English: 州西南冈陀高下，置道因之。
user
The hills and slopes to the southwest of the prefecture city are undulating, and the roads were built to follow the terrain.
assistant