Giving introductions on American geography, culture, history, customs, education systems and other western social and cultural information;
介绍美国文化、地理、历史、习俗礼仪、美中各自的教育系统及其他相关的社会文化知识；
Giving introductions on American geography, culture, history, customs, education systems and other western social and cultural information;
介绍美国文化、地理、历史、习俗礼仪、美中各自的教育系统及其他相关的社会文化知识；
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