Definition
to unexpectedly conceive an idea, particularly one that addresses a problem.
意外地想到；巧合地想出
He hit upon a great idea for solving the problem while he was out for a walk.
他在散步時意外想出一個解決問題的好主意。
While studying, she hit upon a plan that would help her ace the exam.
在學習時，她意外想到一個能幫助她考試得高分的計劃。
After hours of thinking, he finally hit upon an inspiration to complete the project.
經過幾個小時的思考，他終於靈光一閃，完成了這個項目。