The tight race is almost a duplicate of the elections in Georgia and South Dakota last month that pitted a Republican challenger against a Democratic incumbent.

这次紧张的竞选几乎是上个月在佐治亚州和南达科他州选举的翻版，由一个共和党的挑战者竞争一个现任的民主党人。

《柯林斯英汉双解大词典》

After the 2006 election, Sean Trende constructed a graph comparing the incumbent campaign spending advantages with their eventual margins of victory.

2006年大选后，肖恩•特伦德制作了一张图表，将现任总统的竞选开支优势与他们最终的获胜优势进行比较。

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As the focus of such people is rarely on these topics, it is usually incumbent on a senior technical professional to extract the information from them.

由于这些人关注的问题很少在这些主题上，因此为他们提取这些信息的职责就落到了某个资深的技术人员身上。

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The incumbent has 54 percent of valid votes above the absolute majority needed to avoid a second round of balloting.

VOA: standard.2009.09.08

So far,the incumbent, President Hamid Karzai has a comfortable lead over his closest challenger, former foreign minister Abdullah Abdullah.

VOA: standard.2009.09.07

"So,when an event like this occurs, it is incumbent upon a Democrat to react quickly and decisively, and Obama failed to do it."

VOA: standard.2010.01.06

Excusing low growth due to industry, or economic, weakness merely gives the incumbent a pass.

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Farther north, tea-party activists are targeting incumbent Rep. Frank Pallone in a district that runs along the coast, but polls have shown the incumbent with a lead over Anna Little.

WSJ: Greater New York Campaigns Turn to Getting Out Their Voters

He was easily the incumbent's equal and maybe more than that, so he became for the first time a real alternative to the incumbent, a living one, not just a name on a ballot.

WSJ: Romney Deflates the President