n.霹雳；晴天霹雳似的消息或事件
Scared by the thunderclap, the child began to cry. 小孩受到雷电的惊吓，哭了起来。
The news came like a thunderclap from the blue sky. 那消息好像晴天霹雳。
There were many flashes of lightning without thunderclap in the air. 空中出现好多次闪电，但是没有雷声。
