例句與造句

1. There are also isogonal triacontagrams constructed as deeper truncations of the regular pentadecagon { 15 } and pentadecagram { 15 / 7 }, and inverted pentadecagrams { 15 / 11 }, and { 15 / 13 }.
2. It's difficult to find regular pentadecagon in a sentence. 用regular pentadecagon造句挺難的