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