1) a spring in your step 步子非常轻快

Something really good must have happened to 白洁! She's walking with a spring in her step today! 白洁好像发生了很好的事情啊！她的步子非常轻快！

2) springy 有弹性的

This bed is really springy! 这个床很有弹性的！

This couch is really springy! 这个沙发很有弹性的！

3) spring something on someone 等到最后一刻告诉某人

I hate to spring this on you at the last minute, but I really need you to turn in the report by 3pm! 真抱歉等到最后一刻告诉你，但是你一定在3点之前交给我你的报告吧！

4) spring at someone 向某人扑去

Her cat stared at me for a minute, and then suddenly sprang right at my face!! Crazy cat!! 她的猫先看了我一会儿，然后突然朝我的脸扑过来！这只猫真是疯了！