timepiece that indicates the daylight hours by the shadow that the gnomon casts on a calibrated dial
造句
Churchyards often have sundials in them. 教堂大院里通常設(shè)置日晷。
Inventors created sundials, which indicate time by the length or direction of the sun\\\'s shadow, to track temporal hours during the day. 當(dāng)時(shí)的發(fā)明家制造了日晷，利用太陽陰影的長(zhǎng)度或角度，來測(cè)量白天真時(shí)的變化。