圆形用英语说是 "circle"，它来源于拉丁语 "circulus"，意为"小圆"或"圆环"。例句：

The sun is a huge circle of fire in the sky. (太阳是天空中一个巨大的火圆。)

The ring on my finger is a small circle of gold. (我的戒指是一个小金圆环。)

The earth is a circle that spins around the sun. (地球是一个绕着太阳旋转的圆形。)