需要利用这一信息用书签更新活动。
You need this information to update the activity with a bookmark.
添加一条消息或描述，解释向该组、活动或博客添加书签的原因。
Add a message or description to explain why you're adding the bookmark to that group, activity, or blog.
例如，高优先级活动的新条目提要，一个来自某同事的书签的提要，还有一个具有特定标签的新的博客条目提要。
For example, you can have a feed of new entries to your high-priority activities, another feed from a colleague's bookmarks, and another from new blog entries with a particular tag.
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