用户在线时，可以通过mini-facebook与其他参与者聊天，交流感想。
Once on the site, users could chat with other participants of the study in a kind of mini-Facebook setting.
各抒己见——交流感悟，感想，提出疑惑、问题。
Express their views - the exchange of insights, feelings, the doubts, the problem.
各抒己见——交流感悟，感想，提出疑惑、问题。
Express their views - the exchange of insights, feelings, the doubts, the problem.
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