圭表的英文

[天文学] an ancient chinese sundial consisting of an elongated dial and one or two gnomons

例句与用法

1. “ it is called the sundial . it ' s used to measure time
   “这个东西叫做圭表，是用来计时的。 ”
2. From then on , people were able to measure time and determine seasons based on the position and length of the gnomon ' s shadow
   从此，人们便通过观测圭表上日影的长短变化来计算时间、测定季节。

百科释义

圭表是中国古代根据日影长度变化测定季节、划分四季和推算历法的工具。圭表由“圭”和“表”组成，表是一根垂直立于地面的杆或柱；圭是地面一根垂直于立杆或立柱的水平标尺，指向正北。