an octagonal coin
八角形硬幣
牛津詞典
Eight . A circle has 1 line , and an octagon has 8.
如果圈代表一個(gè),八角形是多少?
期刊摘選
The design of octagon vase is tall and simple; the glaze color is green and clear.
八棱瓶造型簡潔挺拔, 釉色青綠瑩潤.
期刊摘選
Various windows embellish the corridor, with the shape of square, circle, hexagon and octagon.
走廊的窗戶形狀各異，有方形，有圓形，有六角形，也有八角形。
辭典例句
