音标发音英式音标 ['nɒnəg(ə)n]美式音标 ['nɑnəɡɑn]国际音标 ['nɔnəɡɔn]英式发音 美式发音 基本解释n.九边形同根派生 nonagon相关词英英字典剑桥英英字典 a flat shape with nine straight sides柯林斯英英字典 a polygon having nine sides (Also called enneagon)nonagon剑桥字典nonagon柯林斯字典专业释义数学九角形九变形九边形