The enterprise is facing the unprecedented challenge and the opportunity.

企业正面临着前所未有的挑战与机遇。

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Veterans from around the world had surmounted one more unprecedented challenge.

来自世界各地的退伍军人显然又是一个空前挑战。

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The safety of our country petroleum import is suffering the unprecedented challenge.

我国的石油进口安全受到前所未有的挑战。

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Finally, the BP spill has presented an unprecedented challenge as an emergency environmental response and a long-term restoration effort.

WHITEHOUSE: Blog Action Day: Protecting America��s Waters Today

The sleeper absentee-ballot lawsuit from Seminole County or Gore's unprecedented challenge to the presidential election results before Judge N.

CNN: May It Please The Court

Mr Abe said the process of dismantling the plant, which was decommissioned after the disaster, was an "unprecedented challenge".

BBC: Japan PM Abe praises Fukushima nuclear work during visit