一道闪电划破夜空，照亮了整个山谷。

A bright ___lightning-bolt split the night sky, lighting up the entire valley.

就在他准备放弃演讲时，突然灵光一闪想出了完美的开场白。

Just as he was about to give up on his speech, a ___lightning-bolt of inspiration gave him the perfect opening line.

那辆跑车像闪电一样冲过赛道。

The sports car raced down the track like ___lightning.