从前，有个叫小强的男孩住在一个小村庄里。
有一天，他的爸爸把一头牛系在了村口的大树下，然后就去忙别的事情了。
过了一会儿，一个陌生人经过村子，看到了那头牛。
他想：“这头牛没人看着，我可以把它牵走。”
于是，他就顺手牵走了牛。
小强的爸爸回来发现牛不见了，非常着急。
他告诉村里的人，牛被偷了。
大家都很生气，决定一起去找回牛。
他们开始搜寻整个村子，希望能找到偷牛的人。
在这个过程中，他们无意间怀疑到了小强的邻居大勇。
因为大勇平时总是喜欢恶作剧，所以大家觉得他可能就是那个偷牛的人。
就这样，无辜的大勇被村民们误认为是偷牛的小偷，遭受了不白之冤。
他百口莫辩，只能忍受着这种无妄之灾。
最后，当真正的偷牛人被抓住时，大家才明白自己错怪了大勇。
他们感到非常抱歉，向大勇道歉，并承诺以后不再轻易怀疑别人。
从此，“无妄之灾”这个成语就被用来形容那些意外发生的、让人意想不到的灾祸。
它提醒我们要学会理性思考，不要轻易怀疑和指责别人。
Once upon a time, there was a boy named Jack who lived in a small village.
One day, his father tied a cow under a big tree at the village entrance and went to attend other matters.
After a while, a stranger passed by the village and saw the cow.
He thought, "This cow is unattended. I can take it away."
So he took the cow away without hesitation.
When Jack's father returned and found the cow missing, he became very worried.
He told the villagers that the cow had been stolen.
Everyone was furious and decided to work together to find the cow.
They began searching the entire village, hoping to find the thief.
In the process, they unintentionally suspected Jack's neighbor, Tom.
Because Tom always liked to play pranks, everyone thought he might be the one who stole the cow.
Thus, innocent Tom was mistakenly accused of being the cow thief by the villagers.
He couldn't defend himself and had to endure this unexpected misfortune.
Finally, when the real cow thief was caught, everyone realized they had wronged Tom.
They felt very sorry, apologized to Tom, and promised not to easily suspect others in the future.
From then on, the idiom 'unexpected misfortune' was used to describe unexpected disasters that happen unexpectedly.
It reminds us to learn to think rationally and not to easily doubt or blame others.
