n.霹靂；晴天霹靂似的消息或事件

Scared by the thunderclap, the child began to cry. 小孩受到雷電的驚嚇，哭了起來。

The news came like a thunderclap from the blue sky. 那消息好像晴天霹靂。

There were many flashes of lightning without thunderclap in the air. 空中出現(xiàn)好多次閃電，但是沒有雷聲。