Ring a bell 使人想起

例句：

I can't put my finger on it, but it definitely rings a bell.

我没法明确说出来是什么，但这绝对听着耳熟。

Goose bumps 鸡皮疙瘩

例句：

I was so touched by the movie that I started getting goose bumps all over my arms.

这电影太感人了，我看得胳臂上起了一层鸡皮疙瘩。

I'm beat 我好累

例句：

I had a tough day today. I'm totally beat.

今天太辛苦了，累死我了。

On the dot 准时地、一秒不差

例句：

I don't want to be waiting for you, so you'd better be there at three o'clock on the dot.

我可不想等你，所以你最好3点钟准时到那。