日晷

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(yáng)陰影的長(zhǎng)度或角度，來(lái)測(cè)量白天真時(shí)的變化。