洞穴探险需要安全帽？我们哪来的安全帽呀？
要对洞穴探险者动机作出满意解释是不可能。
It is impossible to give a satisfactory explanation for a potholer's motives.
要想对洞穴探险者的动机作出满意的解释是不可能的。
It is impossible to give a satisfactory explanation for a pot-holer's motives.
要对洞穴探险者的动机作出满意的解释是不可能的。
It is impossible to give a satisfactory explanation for a potholer's motives.
要想对洞穴探险者的动机做出满意的解释是不可能的。
It is impossible to give a satisfactory explanation for a pot-holer's motives.
假如你遇到困难，可以去找我那些洞穴探险俱乐部的朋友。
If you have any difficulty, go to my friends in the pot-holing club.
假如你遇到困难，可以去找我那些洞穴探险俱乐部的朋友。
If you have any difficulty, go to my friends in the pot-holing club.
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