七边形的

例句：

1. 1. The pentagon is a shape with five sides.
   五边形是一种形状。
2. 2. The pentagon is a shape with five sides that looks like a diamond.
   五边形是一种形状，看起来像一个钻石。
3. 3. The pentagon is a shape with five sides that has many applications in engineering.
   五边形是一种形状，在工程中有广泛的应用。