名詞 open air:

1. where the air is unconfined
   同義詞：outdoors, out-of-doors, open

形容詞 open air:

1. in the open air
   同義詞：alfresco, open-air

1. Exposure to open air for exercise or health-promoting activity.
   戶外運動暴露于空氣中的運動或促進健康的活動
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，假若你正在舉行露天游園交際會，或者露天賀宴，萬一天氣變壞，同樣能夠保證你不受損失。
3. I once had the good luck to hear old Jackson try his lungs in the open air in Scotland.
   一次我有幸聽到老杰克遜在蘇格蘭野外扯著喉嚨練嗓子。
4. Doing exercises in the open air is good for your health.
   露天鍛煉身體有益你的健康。