美国对小学一年级到12年级的孩子实行强制性义务教育，孩子们必须在学校里读完12年，或者至少要到16岁。
In the us we have free compulsory public education for all children from grade 1 to grade 12. Children must stay in school through grade 12, or at least until they are 16.
义务教育是国家以法律保障对学龄儿童实施的一种具有普及、平等、强制、无偿等诸多方面特征的教育制度。
Compulsory education is an education system that the nation has universality to the children at school age which has law guarantee, equal, force, gratis and other characteristic.
义务教育是公民受教育权利的重要组成部分，是由国家强制推行的教育。
Compulsory education is one of the important parts of citizens educated right carried out by government in force.
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