有人說，聰明和愚蠢有時候僅是一線之隔，而這條線兩邊的不同決定導致的結果也會完全不一樣。這條線就叫做stupid line（愚蠢線）。

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.

人們決定做些冒險嘗試時做出的聰明決定和愚蠢決定之間的分界線被稱之為“愚蠢線”。比如，這條分界線可以是你帶著適當的裝備去學登山和什么都不準備就自己出發這兩種行為之間的區別；或者是，把你十歲的孩子單獨留在一個燃著壁爐的房間里跟把一歲孩子留在這樣一個房間的區別。不同的選擇帶來的結果也會完全不同。

For example:

We each have a line of choice that separates smart risk from stupid risk. Where will you draw your stupid line? (Source: Word Spy)

我們每個人都有一個分辨聰明的冒險決定和愚蠢冒險決定的標準線，你的愚蠢線是怎么劃定的呢？

相關閱讀

Smart money 聰明錢？

Take the plunge 冒險嘗試

你今天浪費了幾個“微生命”？

什么是“香檳問題”

（中國日報網英語點津 Helen）

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