He forgot the punch-line of his after-dinner speech.

他在宴会之后的讲话中把那句最绝妙的话给忘了。

If I'm a little hesitant, you'll have to excuse me. This is the first after-dinner speech I've ever made --- except for yelling at my kids in McDonald's.

如果我有点儿犹豫，你们一定要原谅我，这是我第一次饭后演讲——在卖当劳里冲我的小孩儿喊叫除外。