Preteens should learn about sexually transmitted diseases (STDs), birth control, the consequences of teen pregnancy and all the facts about menstruation, wet dreams, and other signs of maturation.是什么意思_Preteens should learn about sexually transmitted diseases (STDs), birth control, the consequences of teen pregnancy and all the facts about menstruation, wet dreams, and other signs of maturation.在线翻译_英语_读音_用法_例句