strategy polygon

• 策略多角形

strategy polygon的用法和样例：

例句

1. Boundaries of the polygon may extend to infinity.
   多角形的边界可以延伸到无穷远处。
2. Two vertexes in adjacent lines are also adjacent on the polygon.
   在毗连的线的二个顶点在多角形上也是毗连的。