Read Edit View history 单位元 dānwèiyuán identity element Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 单位元/單位元 · dānwèiyuán · identity element 2026/03/04 单位元 / 單位元 dānwèiyuán identity element identity element (mathematics) 在乘法运算中，数字1是一个单位元。 created sense Mar 4, 2026, 02:25 AM