“Appropriate sex education programs”和“Unequal exchange”说的是什么

Sex Education 歌词 change和exchange是什么区别? sex是什么 sex education should be taugh in school gender和sex的区别是什么? 英语翻译I suggest that character education programs be altered t education 和development的动词形式是什么? apt和 appropriate的区别? 请问change和exchange的区别是什么啊? exchange program是什么? Personal Information Exchange是什么? 英语翻译Teaching sex education improves medical students’ confid