《徐霞客游记·粤西游日记二》
又走一里，一直下坠到涧底。
又一里，直坠涧底。
Walk for another li. Keep going down until you reach the bottom of the stream. 
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 又一里，直坠涧底。 [/INST] Walk for another li. Keep going down until you reach the bottom of the stream. </s>
Identify the key themes in this Classical Chinese text and explain them in English: 又一里，直坠涧底。
user
Walk for another li. Keep going down until you reach the bottom of the stream.
assistant