《徐霞客游记·黔游日记三》
这之前穿着两层夹衣仍然寒冷，我以为是阴天寒风所致，过几天就应当缓解，到这时虽然天色艳丽明朗，但寒气如故，这才知道此山之中夏天也丢不掉火炉，确实是这样的呀：
先是重夹犹寒，余以为阴风所致，有日当解，至是则日色皎然，而寒气如故，始知此中夏不废垆，良有以耳。
Earlier on, I still felt cold wearing two layers, and I thought it was a result of the overcast sky and cold wind, and it should ease in a few days. It is now a bright and sunny day but the coldness persists, only then did I know that even in summer, one cannot part with a brazier on this mountain. It is indeed true that: