Just being active, like when you run around at outside or play basketball at achool, is a type of exercise.

這是改錯(cuò)題， 答案是去掉了at, 為何呢？

Just being active, like when you run around at outside or play basketball at achool, is a type of exercise.

只不過維持活躍，譬如你在戶外跑步或者在學(xué)校打籃球，都是一種訓(xùn)練。

outside 本事就是一個(gè)地址副詞，副詞前面不可以再加介詞

around outside在外面

I started puttering around outside, not knowing what I was doing.

我開始在外面閑蕩，不了解自己在干什么。

A bunch of kids were hanging around outside.

一群青年在外面到處游逛。

Why are you lurking around outside my house?

你在我房屋外面鬼鬼祟祟的，想做什么？（為介詞）