While challenges remain, Africa has a bright future — you can bet on it, as countless businesses are doing every day.

虽然挑战仍然存在，但是非洲的前途将一片光明。

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For both organisms, multiple diagnostic challenges remain while newer diagnostic modalities are being developed and tested.

针对这两种微生物的多种诊断方法面临着挑战，同时新的诊断方法正在研制和检测中。

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While a large number of methods have been established for numerous problems, many challenges remain to be solved.

即便已经建立了很多方法来处理层出不穷的问题，依然还需要面临许多挑战。

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(OMITTED) Remais,an assistant professor at Emory University's Rollins School of Public Health in Atlanta, He says the growing economy is fueling environmental risks such as air pollution and chemical toxins, while age-old environmental challenges remain.

VOA: standard.2010.04.07

And while challenges remain, the Iraqi people have overwhelmingly rejected the ugly face of Al Qaeda and the other violent extremists who have sought to tear their country apart.

WHITEHOUSE: The White House

While many challenges remain, Egypt has come a long way in the past year, and we hope that all Egyptians will commemorate this anniversary with the spirit of peace and unity that prevailed last January.

WHITEHOUSE: Statement by the Press Secretary on Egypt��s Transition to Democracy | The White House

Our early success to date notwithstanding, we remain focused on effectively navigating the risks and challenges inherent in the integration projects that remain while embedding the Stanley Fulfillment System across the combined entity.

FORBES: Why Stanley Black & Decker? (SWK)