所有的选票和投票的选民都很重要，候选人或其代理人将走访所有的州。竞选团队和政治行动委员会在电视和广播中发布广告，他们还通过电话或邮件向选民拉票。

尽管如此，候选人可以根据“政治算术”来分配竞选活动的资源——在哪些州他们有信心获胜、在哪些州他们感觉会输，还有哪些州输赢都有可能。这第三类州被称为“摇摆州”或“战场州”，这几个或大或小的州在竞选活动和选举中起到尤为重要的作用。

每一位候选人都会致力于赢得这些州的选举人票，以达到在总统大选中胜出所需的270张选举人票。

欲了解更多信息，请参阅链接（中文）：http://iipdigital.usembassy.gov/st/chinese/article/2012/07/201207169100.html#axzz4HZuaXbeK

#US-General Election - Swing States and Why They Matter

All votes — and voters — are important, and all states will be visited by the candidates or their surrogates.  Campaign staffs and political action committees will place advertisements on the radio and TV, and will reach out to potential voters by phone or mail.  

That said, candidates may allocate campaign resources based on the "political math" -- which states they feel confident they can win, which they feel they will lose, and which states could go either way.  

It is this third group of "swing states" or "battleground states," some large and some small, that play a particularly important role in the campaign and the election.  

Each candidate will work to win those states' electoral votes, in order to reach the 270 needed to win the election.

Which states do you think are “swing states" in this election?  

For more info (ch): http://iipdigital.usembassy.gov/st/chinese/article/2012/07/201207169100.html#axzz4HZuaXbeK