It's referred to by some as "the stupid line," the line one crosses from taking a smart risk to taking a stupid risk. It's the difference between, say, learning to mountain climb with the proper gear or just setting out on your own. Or maybe choosing to leave your 10-year-old alone in a room with a lit fireplace, compared to leaving your one-year-old. The consequences of one choice are much different than the other. 人们决定做些冒险尝试时做出的聪明决定和愚蠢决定之间的分界线被称之为“愚蠢线”。比如，这条分界线可以是你带着适当的装备去学登山和什么都不准备就自己出发这两种行为之间的区别；或者是，把你十岁的孩子单独留在一个燃着壁炉的房间里跟把一岁孩子留在这样一个房间的区别。不同的选择带来的结果也会完全不同。 For example: We each have a line of choice that separates smart risk from stupid risk. Where will you draw your stupid line?我们每个人都有一个分辨聪明的冒险决定和愚蠢冒险决定的标准线，你的愚蠢线是怎么划定的呢？