林青：汉生，我介绍一下，这是我的侄女，小薇。小薇，这是我的朋友汉生。    汉生：小薇，你好！    小薇：汉生叔叔好！    
Lin Qing: Han Sheng, let me do a introduction. This is my niece, Xiao Wei. Xiao Wei, this is my friend, Han Sheng. 
Han Sheng: Xiao Wei, nice to meet you!
Xiao Wei: Nice to meet you, Uncle Han Sheng.

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Linqing: Hansheng, let me give you an introduction. This is my niece, Xiaowei. Xiaowei, this is my friend Hansheng.
Hansheng: Xiaowei, Hello!
Xiaowei: Hello Uncle Hansheng! Lesson Content: Linqing: Hansheng, let me give you an introduction. This is my niece, Xiaowei. Xiaowei, this is my friend Hansheng.
Hansheng: Xiaowei, Hello!
Xiaowei: Hello Uncle Hansheng!

• introduction [,intrə´dʌkʃən]   n.介绍；引言；引导   (初中英语单词)
• summary [´sʌməri]   a.&n.摘要(的)   (英语四级单词)