Bicycling was a great way to get the kids out of the house and into the fresh air without spending any money.

骑自行车是个好方法，不用花一分钱就能让孩子们走出家门，呼吸新鲜空气。

youdao

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

Exercise is a known way to lift your mood. Is it a good idea to suggestthat your loved one with depression go out and enjoy some fresh air andactivity?

锻炼是众人所知的提升情绪的一个方法。建议患有抑郁症的至爱出门享受新鲜空气和户外活动是否可行？

youdao

In the nineties and around the turn of the millennium, some of the clever idea people in very prestigious firms got a little carried away and figured out a way to essentially create basis out of thin air, which would mean that nobody with substantial capital gains would ever have to pay tax on them again.

FORBES: Should We Care About Romney's Unreleased Tax Returns ?

Lichens are sensitive to changes in their environment, and scientists use lichens as a way of finding out whether air is polluted or clean.

BBC: York & North Yorkshire - Can you help identify lichen?

The second time he said it again now she shook her head and laughed in an unhappy way that was more just air out her nose.

NEWYORKER: Good People