《徐霞客游记·粤西游日记四》
只是中洞低伏，不能抬起头，必须从洞外横着走过去，好像台榭一样，不经由洞中的深处走。
第中窍卑伏，不能昂首，须从窍外横度，若台榭然，不由中奥也。
However, the middle cave was low and squat, and I couldn't stand upright, and had to go around the cave from outside, as if on a terrace, and couldn't go into the depths of the cave.