《徐霞客游记·滇游日记三十九》
一里，向西北爬过坎坷的岩石，半里，抵达石城南垂的山脚。
一里，西北陟坎坷之石，半里，抵石城南垂之足。
One li later, we climbed over the rugged rocks to the northwest and half a li later, we reached the foot of the southern slope of the Shibi mountain.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 一里，西北陟坎坷之石，半里，抵石城南垂之足。 [/INST] One li later, we climbed over the rugged rocks to the northwest and half a li later, we reached the foot of the southern slope of the Shibi mountain.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 一里，西北陟坎坷之石，半里，抵石城南垂之足。
user
One li later, we climbed over the rugged rocks to the northwest and half a li later, we reached the foot of the southern slope of the Shibi mountain.
assistant