The global emergence of the population question poses a serious challenge to many countries and regions.

人口问题在全球范围出现，成为许多国家和地区面临的严重挑战。

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The United States has expressed concern about an arms build-up in Venezuela saying it poses a serious challenge to stability.

美国对委内瑞拉的武器积累表示担忧。美国表示，这对稳定提出了一个严峻的挑战。

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Aging poses a serious challenge to OECD (Organization of Economic Co-operation and Development) countries, in particular, how to pay for future public pension liabilities.

老龄化给经合组织国家，尤其是在如何支付未来的公共养老金负债方面，带来了严重的挑战。

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All of this technological progress creates a more flexible work environment and contributes to a healthy work-life balance, but it poses a serious challenge to IT professionals, who face a new set of threats to data and network security.

FORBES: Securing Corporate Data In An Increasingly Mobile World

"I think all of this poses a serious challenge to the British and Irish governments and I think they must now tell us what they intend to do about the fact that David Trimble has now jumped onto the "No" agenda, " he said.

BBC: Premiers discuss NI sanctions rift