A framed opening,as in a wall,door,or window,fitted with fixed or movable horizontal slats for admitting air and light and shedding rain.

• 固定百叶窗，一个有框架的开口处，比如在一堵墙里，门里或窗户里安装有固定的或活动的水平条板，用来通风、采光、遮雨。