Joke: It's raining, everyone is running, but one person is slow. Everyone wants to know why he didn't run. The man said it was raining ahead, too. ...

Actually, this is a false proposition. Everyone always thinks that the answer is "the same". In fact, this is wrong, because it is necessary to judge whether the same rainfall is caught by "equal rainfall".

For example, at the same distance of 10 meter, the rainfall per meter per second is 1ml. If A runs this distance at 1 sec, the rainfall he receives should be: 1 sec *1ml *10m = 10ml.

The so-called journey is the same, so is the rain. It's actually a lie. 1 sec is the same as 1 day. Can rain be the same? Think about it.