open air

名词 open air:

1. where the air is unconfined
   同义词：outdoors, out-of-doors, open

形容词 open air:

1. in the open air
   同义词：alfresco, open-air

1. Exposure to open air for exercise or health-promoting activity.
   户外运动暴露于空气中的运动或促进健康的活动
2. If, however, you were holding an open air garden party or a fete it would be equally possible to insure youself in the event of bad weather.
   然而，假若你正在举行露天游园交际会，或者露天贺宴，万一天气变坏，同样能够保证你不受损失。
3. I once had the good luck to hear old Jackson try his lungs in the open air in Scotland.
   一次我有幸听到老杰克逊在苏格兰野外扯着喉咙练嗓子。
4. Doing exercises in the open air is good for your health.
   露天锻炼身体有益你的健康。