Preschool is used to describe things relating to the care and education of children before they reach the age when they have to go to school. 入学前的; 学龄前的
adjective [原级]未满学龄的;就学前的,入学前的
Looking after preschool children is very tiring. 照顾学龄前儿童很累人。
noun [集合/集体]幼儿园,育幼院
The state should move toward the goal of preschool for all 3- and 4-year-olds. 国家应朝着为所有三到四岁儿童开办学前学校的目标努力。