circle

/ˈsərkəl/

ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point

中文释义：圆；圆圈；圆形

The teacher drew a circle on the blackboard to explain geometry.

老师在黑板上画了一个圆来解释几何。

The children sat in a circle and played a game.

孩子们坐成一个圆圈玩游戏。