HomeDictionary等差级数等差级数Wordarithmetic series (such as 2+4+6+8+...)Traditional等差級數Copy wordděng chā jí shùdeng3cha1ji2shu4Hear itMeaningarithmetic series (such as 2+4+6+8+...) CC-CEDICTCharacters in 等差级数等děng差chà级jí数shù