名词 spring 有两个含义，一个是“春天”，另一个是“弹簧”。A spring in one's step 的字面意思是“脚步里装了弹簧”，但实际表达的意思是“因为心情好而令人脚步更加自信，更有朝气”。

例句

There's definitely been a spring in her step since she met Michael.

自从她遇到迈克之后，走起路来脚步都变得轻快了。

I am sure you'll be walking with a spring in your step when I tell you the news.

我相信我告诉你这个消息后，你肯定走路的步伐都会变得轻快。

Sam has been walking around with a spring in his step ever since the manager announced his promotion.

自从经理宣布山姆升职的消息后，山姆精神抖擞，走路步伐格外轻快。