what is even harder to catch if you run faster?

what is even harder to catch if you run faster?
what is even harder to catch if you run faster?

what is even harder to catch if you run faster?
your Breath
Or your shadow
有一句固定语 是 你喘口气 叫做 catch a breath
可能就是这个了

如果你跑快些，还有什么会难得让你追不上的？