outdoor activities 户外活动
in the open air 在露天
fresh air 新鲜空气
out-of-doors life 户外生活
A: Do you prefer studying indoors or out-of-doors?
A：你更喜欢在室内还是在户外学习？
B: I definitely prefer out-of-doors because the air is fresher.
B：我肯定更喜欢在户外，因为空气更清新。
1) 在户外
2) 露天的
3) 在室外环境
1. 在户外；在室外
adverb/adjective
1. In or into the open air; outside a building.
Synonym: outdoors, open-air