说明在游戏中。
这说明这是历史上第一次在全国竞选中在电子游戏中来打竞选广告，并且这一事件导致了一些争论，就像奥巴马经常攻击电子游戏的危害。
This appears to be the first time that a national campaign has made a buy in a video game, and is leading to some debate, as Obama often campaigns about th dangers of video games.
这很有力地说明了，玩家在游戏中不断学习如何处理数据，以及根据游戏规则来解决各种问题。
This is where it's easiest to say that players are learning how to process data and figuring out how it fits together in game form.
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