《徐霞客游记·滇游日记三十五》
二里多，有水流自北边的山涧中流来，涉过涧水，就向东上走。
二里余，有水自北涧来，涉之，遂东上。
More than two li, there was a stream of water flowing from the ravine in the north, crossed the stream, and walked eastward.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 二里余，有水自北涧来，涉之，遂东上。 [/INST] More than two li, there was a stream of water flowing from the ravine in the north, crossed the stream, and walked eastward.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 二里余，有水自北涧来，涉之，遂东上。
user
More than two li, there was a stream of water flowing from the ravine in the north, crossed the stream, and walked eastward.
assistant