Exxon is contending with two major challenges.

埃克森美孚正在着手应对两大挑战。

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We had two major challenges: an ambitious schedule and long-term complexity.

我们面临两大挑战：一份很紧凑的时间表和长期的复杂性。

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For intelligent women are concerned, the two major life challenges is a good man and a good challenge house.

对于聪明的女人来说，人生的两件大事就是挑一个好的男人和挑一套好的房子。

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Kamrany says entrepreneurs face two major challenges creating an idea and securing funding for it.

VOA: standard.2010.01.31

With these two major challenges achieved, the Kremer prize would look to new and different areas to encourage eager engineering teams to explore.

ENGADGET: The Highs and Lows of Human-Powered Flight Alt

Though the challenges of the health care system seem daunting, I see two key trends that will cause major changes to the industry.

FORBES: Launching A Revolution In Health