SIP或许将建立一个一套完整的会话类型，和电话呼叫几乎没有任何相同之处。
SIP will likely be used to establish a whole set of session types that bear almost no resemblance to a telephone call.
关于会话，前人提出了许多理论，就具体会话类型也做了大量研究，如日常会话、电视会话、课堂会话。
Plenty of theories advanced on the study of this topic have been conducted on the types of conversation, such as everyday dialogues, television dialogues on and class dialogues, etc.
随着广播媒体形式的日益丰富，广播热线直播节目也日益普遍，成为一种特殊的会话类型，为人们所喜爱。
As broadcast media vary day after day, live broadcast hotline programs become increasingly popular to common people and finally turn into a new type of conversation.
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