恍然大悟

Tony glanced at her, then did a double take .

托尼瞥了她一眼，过后才恍然悟。

The speaker gave us a humorous joke which suddenly clicked with us and we all laughed.

"演说的人给家讲了个话,使们一下子恍然悟,于是们都。"

I wasn't used to such good treatment, then it clicked : we were wearing suits.

不习惯这么有礼的招待，随后恍然悟：是因为们穿着西装。