As the influence of information imbalance, the agenda setting of media is the objective phenomena, and causing the new trend of information transmission.

受信息不平衡影响，媒介间的议程设置成为新闻场中的客观现象，也引起信息传播形成新的流向；

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Then, it analyses the characters of the Agenda setting, from the level of the communication effects, the timely character of the public contacting the media and the gate keeping of the media.

首先，分析了媒介议程对公众议程的影响。然后，从传播效果的层次、受众媒介接触时间属性以及信息传播过程的把关行为，详细分析了议程设置理论的特点。

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What we should pay attention to is that, in the science communicating for public, it is not science community but media that controls the agenda setting of science communication.

在面向公众的科学传播中，媒体而不是科学共同体正在左右着科学传播的议程，这是应当引起我们重视的问题。

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