an octagonal coin
八角形硬币
牛津词典
Eight . A circle has 1 line , and an octagon has 8.
如果圈代表一个,八角形是多少?
期刊摘选
The design of octagon vase is tall and simple; the glaze color is green and clear.
八棱瓶造型简洁挺拔, 釉色青绿莹润.
期刊摘选
Various windows embellish the corridor, with the shape of square, circle, hexagon and octagon.
走廊的窗户形状各异，有方形，有圆形，有六角形，也有八角形。
辞典例句
