加入到一个群组后，单击留言板并浏览正在讨论的话题(参见图17)。

Once you've joined a group, click Message Board and scan the topics that are being discussed (see Figure 17).

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但是在Slashdot上，一条留言往往会引发出新的讨论话题——具有更多枝桠的讨论树。

But on Slashdot, a comment will often provoke a new thread of conversation-a tree with more branches.

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