USSD service system adopts connection-oriented conversational mode, which is an ideal carrier for conversational services.
USSD系统采用面向连接的交互式会话方式，是会话类业务的理想载体。
We should explore the mode of conversational teaching in practice and at the same time we must pay more attention to its dialectic method.
我们在实践中探讨对话式教学模式的同时，也要注意对话式教学的辩证法。
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