Read Edit View history 西格玛 xīgémǎ sigma Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 西格玛/西格瑪 · xīgémǎ · sigma 2026/03/04 西格玛 / 西格瑪 xīgémǎ sigma sigma (Greek letter Σ, σ) 西格玛是第十八个希腊字母。 proper name created sense Mar 4, 2026, 02:25 AM