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gnomon n.1.(日晷的)晷針,指時針。2.【數學】磬折形〔自平...

gnomonic

From then on , people were able to measure time and determine seasons based on the position and length of the gnomon ' s shadow 從此,人們便通過觀測圭表上日影的長短變化來計算時間、測定季節。

It appears as a small gnomon with lines extending in each major direction ( along the x , y , and zaxis ) 它看起來象是一個小的指時針和在每個主要的軸向上( x , y , z軸)的線的延伸。

A stake used for this purpose was the earliest type of sundial and was called a gnomon . 這種特定的標桿就是最早的一種日晷儀,人們稱之為日晷儀標桿。

In all cases the gnomon lies in the plane of the meridian . 表始終都處于子午面內。