On Thursday, he made a final pitch to convince undecided voters.

星期四，他做了最后努力，争取说服尚未拿定主意的选民。

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To win over the undecided voters, they are working twice as hard.

为了把尚未拿定主意的选民争取过来，他们正在加倍努力工作。

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They took questions before a group of undecided voters in the style of a town hall meeting.

像市政厅会议的风格一样，他们在一群并未决定如何投票的选民面前回答问题。

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A survey published by the research group ComRes on Tuesday said 2.5 million people who say they are certain to vote say they are still undecided who to vote for and more than a third of voters said it was "quite possible" they would change their mind on who to vote for by the time the polls open Thursday morning.

VOA: standard.2010.05.05

And in small cities like Marysville, all the undecided voters could swing the results either way.

NPR: Michigan Town Weighs Presidential Choices

But both campaigns are hoping to energize the undecided voters, like 22 year old Davian Percy.

NPR: Obama, Clinton Target Maryland's Black Vote

But there were still undecided voters to be found, such as Renee Mullins of Fairfax.

NPR: Virginia Democrats Eager for Primary, Election