芯是酸的
13 至 19 岁的少年人. 因13 至19 都用 teen 表示, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen
蚊防四宝
“青少年”英语专用词汇有两个：adolescent 和 Juvenile。例句1:Today, the problem of adolescent's committing crime has been a serious problem which obsesses the society and hinders social development例句2： Comparison and Research on Preventive Education of Juvenile Delinquency between China and the United States
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