Each blue circle is a tweet, and they are sized by number of retweets.

每个蓝圈代表一条推特信息，其大小由跟随回复信息量的多少决定。

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Pick up the blue pencil and draw a circle on the card of the first pile.

在第一堆上面的卡片上用蓝色的铅笔画一个圈。

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Pick up the blue pencil and draw a circle on the card of the first pile.

在第一堆上面的卡片上用蓝色的铅笔画一个圈。

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