a. located, suited for, or taking place within a building
s. within doors
a. 户内的, 室内的
1. I like to play indoor games on rainy days.
我喜欢在雨天玩室内游戏。
2. The indoor pool is open all year round.
室内游泳池全年开放。
3. We decided to have an indoor picnic because of the cold weather.
我们决定因为天气寒冷而在室内野餐。