“a spring in one's step”别理解成“春天的脚步”，其正确的含义是步伐轻快；（走路）轻松自信。

【例句】
There's been a definite spring in his step ever since he met Joanna.
自从他遇见乔安娜之后，走起路来步伐都轻快了。

I bet you'll have a spring in your step after I tell you this bit of good news!
我敢打赌，在我告诉你这个好消息后，你的走路的步伐都轻快了。