clere·sto·ry
noun/ˈklɪəstɔːri/
/ˈklɪrstɔːri/
(plural clerestories)
(architecture)- the upper part of a wall in a large church, with a row of windows in it, above the level of the lower roofs
（大教堂中在高于周围屋顶的墙壁上开的）侧天窗，高侧窗 Word Originlate Middle English: from clear + storey.