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1·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》

2·They again ate outside, for Clara had to be in the open air all day, if possible.

他们又在外面吃饭了，因为克拉拉如果她可以的话，一整天都会待在露天里。

3·In zoos, animals are no longer kept in cages, but in great spaces, either in the open air or in enormous greenhouses.

在动物园里，动物不再被关在笼子里，而是生活在广阔的空间里：要么是露天的环境，要么是巨大的温室。

4·The National Parks in England are called England's Breathing Spaces because they are places where people can go to be in the open air, away from the dirt and noise of cities.

英国的国家公园被称为“英国的呼吸空间”，因为在那里人们可以远离城市的尘土和噪音，享受户外的空气。

5·He likes to cook in the open air.

他喜欢在外面做饭。《牛津词典》

6·Do you want to go camping in the open air?

你想去户外野营吗？

7·If the temperature is below 0℃, water will turn into ice in the open air.

如果温度低于0摄氏度，水在室外就会结冰。

8·To take exercise in doors is less beneficial than in the open air.

在室内锻炼不如在室外锻炼更有益。

9·The film will be shown in the open air tonight.

今晚电影在露天演。《新英汉大辞典》

10·The film will be shown in the open air.

电影将露天放映。