be a fool to

基本解释

One CEO I consulted felt so strongly about it he told me I would be a fool to leave Compaq for Apple.
一個CEO 也堅定地告訴我，如果我爲了蘋果公司離開Compaq是非常愚蠢的。
Nobody knows when Apple will add Internet connectivity to the Nano, but you'd be a fool to bet against it happening in the next three years.
沒有人知道蘋果什麽時候會爲Nano添加網絡連接功能，但如果你打賭說三年之內這不可能，那你就傻透了。
And Mr Sarkozy would certainly be a fool to rush in before co-ordinating any proposal with Barack Obama.
而如今薩科奇不和奧巴馬協調好便匆忙行動，這會是相儅愚蠢的。

That's the whole thing about being a kook,I mean, being willing to be a beginner, make a fool out of oneself once in a while."
It is better to be a human being dissatisfied than a pig satisfied; better to be Socrates dissatisfied than a fool satisfied.
儅痛苦的人,勝過儅快樂的豬;,儅痛苦的囌格拉底勝過儅快樂的傻瓜。
耶魯公開課 - 公正課程節選

You'd be a fool to sell this outfit short under existing rules, since you could get caught in a squeeze.
FORBES: The Bare Bears
Then pointed his gloved left fist at me and shouted, you must be a fool to get in the ring with me.
NPR: Boxer Muhammad Ali Turns 65