英语释义
1. a roof lantern or turret often with slatted apertures for escape of smoke or admission of light in a medieval building
2. an opening provided with one or more slanted fixed or movable fins to allow flow of air but to exclude rain or sun or to provide privacy
3. a finned or vaned device for controlling a flow of air or the radiation of light
4. a fin or shutter of a louver
5. an opening in a door or window that has one or more slanted strips to allow air to flow in and out while keeping out rain and sun
6. one of the slanted strips of a louver