In the 1980s, Japan became the new challenger to American supremacy.

上世纪80年代，日本成为美国霸主地位的最新挑战者。

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But that is not the end of the matter. In 2010 the G20 will face a new challenger-the G2.

但是这还远远没有结束，在2010年，G20将面临一个新的挑战——G2。

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A close race is being held for governor in New Jersey where the Democratic incumbent, John Corzine,is trying to hold off Republican challenger Chris Christie and independent candidate Chris Daggett.

VOA: standard.2009.11.02

The House race in upstate New York is getting a lot of attention after the Republican candidate pulled out, leaving a Democrat and a challenger running under the Conservative Party banner.

VOA: standard.2009.11.02

McLaren's new challenger is expected to follow that trend.

BBC: Hamilton eyeing second title bid

The opposition includes one serious new challenger, Keadilan (the Justice Party), a previously tiny group that was taken over this year by Wan Azizah Ismail, the wife of Dr Mahathir's jailed former deputy, Anwar Ibrahim.

ECONOMIST: The prime minister keeps the opposition waiting

This is one of those technological break points, a time when an entirely new challenger has a chance to break in and determine which OS, which ecosystem users are locked into for the next few years, perhaps decades.

FORBES: Google, Apple, Amazon, Microsoft: The Holiday Tablets Fight, Fight, Fight!