Younger Scout: How can I tell the difference between a mushroom and a toadstool?
年少的童子军：我怎样才能把蘑菇和毒蕈区别开呢?

Older Scout: Just eat one before you go to bed. If you wake up the next morning, it was a mushroom.
年长的童子军：上床前吃一个。如果你第二天早上醒来，那就是蘑菇。

词汇学习：
Scout 侦察兵
difference 不同、差异 
mushroom 蘑菇