相關單詞近義詞 diffidence 無自信, retardation 智力遲鈍, subnormality 遜常態(tài), slowness 緩慢, mental retardation 智力遲鈍臨近詞backward, backward decay, backward power, backward going, backward curve, backward lunge, backward branc, backward class, backward chanel, backward search, backward caries 返回 backwardness