灵机一动 To have a flash of inspiration
Explanation
灵机一动是一个成语，形容突然想到一个好主意，也指突然想到一个解决问题的方法。
"To have a flash of inspiration" is an idiom that describes suddenly coming up with a good idea, or suddenly finding a solution to a problem.
Origin Story
小明是一个爱思考的孩子，有一天，他在公园里玩耍时，看到一群小朋友在玩捉迷藏。他灵机一动，想出了一个好办法，他在树下挖了一个小坑，然后把自己藏了进去。小朋友们找了好久都找不到他，最后还是小明自己跳了出来，告诉大家他躲在哪里。小朋友们都惊叹于小明的聪明才智，纷纷夸奖他。
A young boy named Alex was playing in the park when he saw a group of children playing hide-and-seek. He had a flash of inspiration and came up with a good idea. He hid himself in a small pit he dug under a tree. The children searched for a long time but couldn’t find him. Finally, Alex jumped out and told everyone where he was hiding. The children were amazed at Alex’s wit and intelligence and praised him.
Usage
灵机一动常用来形容在紧急情况下，突然想到一个好办法。
"To have a flash of inspiration" is often used to describe suddenly coming up with a good idea in an emergency.
Examples
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他灵机一动，想出了一个好办法。
tā líng jī yī dòng, xiǎng chū le yī ge hǎo bàn fǎ.
He had a flash of inspiration and came up with a good idea.
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面对突发状况，我们必须灵机一动，随机应变。
miàn duì tū fā zhuàng kuàng, wǒ men bì xū líng jī yī dòng, suí jī yìng biàn.
In an emergency, we must be resourceful and adapt to the situation.
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比赛中，他灵机一动，改变了战术，最终获得了胜利。
bǐ sài zhōng, tā líng jī yī dòng, gǎi biàn le zhàn shù, zuì zhōng huò dé le shèng lì.
In the competition, he had a flash of inspiration, changed his tactics, and ultimately won the victory.