多角形的边界可以延伸到无穷远处.Boundaries of the polygon may extend to infinity.颗粒呈简单的多角形.The grains take on simple polygonal.这些名建筑是以圆形和多角形为基础而设计建造.These famous buildings are based on circles and polygons....
The beautiful sweeping coastline was cloaked in mist.美丽的海岸线一望无际，笼罩在迷雾之中。Birds, sea-life and the coastline all suffered grievously.鸟类、海洋生物及沿海生物均受到严重影响。The sea is eating away the coastline.海水侵蚀着海岸线。The oil washed ashore on...