三个旅行者同时住进一家旅店。早上出门的时候,一个旅行者带了一把伞,另一个拿了一根拐杖,第三个旅行者什么也没拿。晚上归来的时候,拿伞的旅行者淋得满身是水,拿拐杖的旅行者跌得满身是伤,第三个旅行者却安然无恙。于是,前两个旅行者很纳闷,问第三个旅行者:“你怎么会没事呢?” Three travelers live in a hotel at the same time. In the morning when a traveler took an umbrella and the other took a cane, the third traveler took nothing. When returning at night, the traveler with the umbrella leached the body covered with water, and the traveler with the cane fell or covered him with injuries. The third traveler was safe and sound. As a result, the first two travelers wondered, asking the third traveler: “Why are you okay?”