单词	preoperational
释义	preoperational adjective pre·​op·​er·​a·​tion·​al ˌprē-ˌä-pə-ˈrā-shnəl  -shə-nᵊl variants or pre-operational psychology : of, relating to, or being the stage of cognitive development according to Jean Piaget's theory in which thought is egocentric and intuitive and not yet logical or capable of performing mental tasks Piaget believed that during the preschool period and up to about age 6 or 7, children are in a preoperational stage—too young to perform mental operations. David G. Myers The preoperational child will invariably point to the taller, thinner glass. He believes that it contains more water because the water level is higher. Dorothy G. Singer & Tracey A. Revenson Word History First Known Use 1951, in the meaning defined above
随便看	anti-epileptics anti-erotic anti-evolution anti-evolutionary anti-evolutionism anti-evolutionist anti-family anti-fascism anti-fascist anti-fashionable anti-fatigue anti-federalist anti-female anti-feminine anti-feminism anti-feminist anti-feminists anti-filibuster anti-flu anti-foaming anti-foreign anti-foreigner anti-formalism anti-formalist anti-fraud

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