“灵机一动”常见的英文表达有 “have a brainwave” 或 “a flash of inspiration”，以下为你展开介绍：
含义：指突然想到一个好主意或有了新想法，强调灵感在瞬间闪现，与“灵机一动”所表达的突然产生巧妙想法的意思相符。
例句：
While washing the dishes, she had a brainwave and came up with a great solution to the problem. （洗碗的时候，她灵机一动，想出了一个解决这个问题的绝妙办法。）
He had a brainwave during the meeting and suggested a new marketing strategy. （他在会议上灵机一动，提出了一个新的营销策略。）
含义：侧重于描述一种突如其来的、具有创造性的灵感，通常是在不经意间产生的，能让人产生新的思路或想法，和“灵机一动”的语境较为契合。
例句：
Just as he was about to give up, he got a flash of inspiration and solved the difficult puzzle. （就在他快要放弃的时候，他灵机一动，解开了这道难题。）
The artist had a flash of inspiration while walking in the park and decided to create a new series of paintings. （这位艺术家在公园散步时灵机一动，决定创作一系列新的画作。）