单词	heptagon
释义	hep·ta·gon \ˈheptəˌgän sometimes -tə̇gən\ noun (-s) Etymology: Greek heptagōnos heptagonal, from hepta seven + -gōnos (from gōnia corner, angle) — more at -gon : a plane polygon having seven angles and therefore seven sides
随便看	exsiccosis ex silentio exsolution exsolve exstipulate ex store exstrophy exsuccous exsudation exsufflation ext ext extant extasy ext d&c color extemporal extemporally extemporaneity extemporaneous extemporaneously extemporaneousness extemporarily extemporary extempore extemporization

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