I scored the winning goal in soccer against our arch-rival.

我在足球比赛中踢进了制胜一球，打败了我们的劲敌。

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I scored the winning goal in soccer against our arch rival.

在与劲敌的比赛中，我进了致胜球。

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America's arch rival, the Soviet Union, had launched not only the first satellite into orbit, but the first person as well.

美国的主要竞争对手，苏联，不但是成功发射第一颗卫星，别且也是第一个载人航天成功的国家。

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But in his conciliatory mood Saturday, Mr.Ravalomanana suggested he would not object to a constitutional change that would allow his arch-rival to seek the presidency.

VOA: standard.2009.11.08

Dassault's arch-rival, Gulfstream Aerospace Corp. of the U.S., is also trying to get into the act.

CNN: ASIANOW - TIME Asia | Travel Watch

Indian police say they have arrested a man suspected of passing military secrets to arch-rival Pakistan.

BBC: India arrests man accused of spying for Pakistan

One analyst has even raised the possibility of a merger with BP, its British arch-rival.

ECONOMIST: A damning verdict | The