pot-holer
/'pɔt,həulə/A potholer is someone who goes into underground caves and tunnels as a leisure activity. 下潜洞穴者
noun [专属名词] 洞穴探险者
Precautions of this sort are necessary, FOR it is impossible to FORetell the exact nature of the difficulties which will confront the pot-holer. 采取这样的预防措施是必要的，因为根本无法确切预测洞穴探险者将会遇到的具体困难类型。
- pot-holer 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 42 Modern cavemen pot-holer 名词: 洞穴探险者
