On a solo trip to Rio I stayed with him and he jokingly told me he could always spot the solo travelers by the red streaks on their backs: the spot they couldn’t reach themselves with sunscreen.

有一次我独自在里奥旅行时到他家里做客，他开玩笑说，他能肯定地认出单飞的旅行者，因为他们背上有红色的条纹：就在背上自己够不着摸防晒油的位置。