Read Edit View history 等差级数 děngchājíshù arithmetic series Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 等差级数/等差級數 · děngchājíshù · arithmetic series 2026/03/04 等差级数 / 等差級數 děngchājíshù arithmetic series arithmetic series (such as 2+4+6+8+...) 在数学课上，我们学习了如何计算等差级数的和。 created sense Mar 4, 2026, 02:25 AM