square：正方形
例句：A square is a figure with four equal sides and four right angles. 正方形是具有四个等边和四个直角的图形。
circle：圆形
例句：On the tip of each branch is a circle radiating brilliant light, symbolizing the sun. 每个枝杈梢头都绘有一个放射光芒的圆圈，代表太阳。
triangle：三角形
例句：The side AB is the shortest of the three sides of the triangle ABC. 边AB是三角形ABC三个边中最短的边。
oval：椭圆形
例句：She has a lovely oval face. 她长着一张可爱的椭圆脸。
rectangle：长方形
例句：Cloth diaper may be folded in a triangle or a rectangle. 用布做的尿布可以叠成三角形或长方形。
