A walk in the fresh air will pep you up.

在清新空气中散散步会使你精神振奋。

《牛津词典》

Note how these animals sometimes walk with their tails up in the air.

注意观察这些动物有时如何翘起尾巴走路。

《牛津词典》

I go out of my way to walk by the building, listening for sounds, smelling the air for rot.

我在那座建筑物附近走来走去，听听动静，嗅嗅空气中有没有传来腐烂的气息。

youdao

Mars has less gravity. My attempts to walk resulted in jumps and hops, which took me into the air.

VOA: special.2010.07.10

I try to come to the park early, you know, get some exercise and get a nice walk and some air.

我尽量早起去公园，去锻炼身体，散步，呼吸新鲜空气。

中央公园的时光 - SpeakingMax英语口语达人

They enliven their gait by bumping each others' hips rhythmically and leaping into the air as they walk.

UNESCO: Culture

When doing a long trip by air, it is always refreshing to walk around and get some fresh air, as opposed to sitting in the terminal.

FORBES: Long Airport Layovers Can Be Vacations, Not Hassles

But how many of Dubai's 1.6m people will give up their 1m air-conditioned cars to walk even short distances in the punishing summer heat?

ECONOMIST: A metro for the Emirates