Indoor activities or things are ones that happen or are used inside a building and not outside. 室内的
adjective [原级] 室内的，户内的
No smoking in any indoor facilities. 在任何室内场所都禁止抽烟。
- 网友用 “Indoor” 造句精选
- Central heating is bad news for indoor plants. 中央供暖系统不利于室内植物。
- If the weather is wet or cold choose an indoor activity. 如果下雨或是天气寒冷，就选择室内活动。