A cold draught of air blew in from the open window.

一股寒气从敞开的窗户吹了进来。

《牛津词典》

We sleep out under the stars, and eat our meals in the open air.

我们露宿在星空下，在户外用餐。

《柯林斯英汉双解大词典》

The door blew open, letting in a rush of cold air.

门被风刮开了，一股冷风疾冲进来。

《牛津词典》

Because of the open-air stage, actors had to shout very loudly and make big motions to be heard and seen by all.

VOA: special.2010.01.06

It's going to take place in there. It's going to be a constant pressure, it might be open to the air, or even if it isn't, there might be plenty of room, and it's a liquid anyway, so the pressure isn't going to change significantly.

也许它是液体，它在这个位置,这是恒压的，它也许是连通大气的，就算不是，它也有，足够的空间，而它是液体,压强不会显著地改变。

麻省理工公开课 - 热力学与动力学课程节选

Weeding,seeding and watering requires at least as much work as crops grown in the open air.

VOA: special.2009.12.22

This is a large private lounge very centrally located on the second floor within the clubhouse, so you can watch races in the traditional fashion, from good open air box seats, then come in as often as you want between races for an air conditioned venue with open bar, free flowing food, live music, large screen and private betting terminals.

FORBES: Start Planning For 2013 Kentucky Derby Now

The growing field is credited with recently saving a baby's life by allowing the speedy manufacturing of medical devices to keep his air passages open, and NASA is exploring ways of using 3-D printing to provide food to astronauts.

WSJ: Public-private partnership pushes '3-D printing'

Open air cultural performances and concerts featuring traditional Qatari sword dancing take place every weekend in the winter.

BBC: Souq Waqif, Doha��s resilient, labyrinthine market