和班里的新同学打招呼是有礼貌的行为，此类问候后紧接着就是自我介绍。
It is polite to greet a new student that joins your class. Introductions immediately follow this type of greeting.
和班里的新同学打招呼是有礼貌的行为，此类问候后紧接着就是自我介绍。
Greetings in the Classroom it is polite to greet a new student that joins your class. Introductions immediately follow this type of greeting.
最实用的是那些表达感激之情和客气礼貌的词语，比如“劳驾”，“谢谢你”，“我可不可以”，以及基本的问候用语。
Most useful are those that express gratitude and politeness such as words for please, thank you, and may I, as well as basic greetings.
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