in.fan.til.ism
n.（名词）A state of arrested development in an adult, characterized by retention of infantile mentality, accompanied by stunted growth and sexual immaturity, and often by dwarfism.幼稚病：一种出现于成年人当中的发育停滞的状态，其特点是思维幼稚，伴有发育不良和性方面的不成熟，还有侏儒现象发生
Extreme immaturity, as in behavior or character:幼稚型：如在行为或性格上表现的特别不成熟：例句：.infantilism, which is the subtext of so much American cinema and culture.(John Simon).幼稚病是许多美国电影和文化的特征.(约翰·西蒙)
An infantile act or remark.幼稚行为：幼稚的行为或言论
