Both the Hall of Prayer for Good Harvests and the Circular Mound Altar are round, each standing on a square yard, again representing Heaven and Earth.

祈年殿与圜丘坛均为圆形，立于方形坛内，象征着天圆地方。

youdao

There was no idol in it, nor image of any kind, but only a mirror of round metal set on an altar of stone.

这里并没有供奉偶像，或是任何有色相的东西，只在石头祭坛上设着一面金属的圆镜子。

youdao

And he shall kill it on the side of the altar northward before the LORD: and the priests, Aaron's sons, shall sprinkle his blood round about upon the altar.

1：11要把羊宰于坛的北边，在耶和华面前，亚伦子孙作祭司的，要把羊血洒在坛的周围。

youdao