Lengthy delays like this are one of the key challenges for NASA, according to an April 2011 report from the US National Academy of Sciences.

美国国家科学院于2011年4月的报告称，这样的长时间延误是美国航空航天局面临的主要挑战之一。

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Other key challenges lie ahead.

印度眼前还有其它挑战。

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The XML configuration extensions solved one of the key challenges.

XML配置扩展解决了关键的挑战之一。

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McKinsey and Hamilton have both been participants Of this projects. And what we've been trying to do is Isolate a few key areas that make sense for MIT doing Explore extensively. Now some of the challenges first Are that the technologies advance quickly.

包括McKinsey和Hamilton都是参与者,我们试图区分出一些关键领域,而不是让麻省理工做广泛的探索,现在的一些挑战在于,科学技术瞬息万变。

麻省理工公开课 - 媒体、教育、市场课程节选

Are they seen as champions of the issues, supporting the fight to advance solutions for key challenges?

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It said the speech addressed "some of the key challenges of the future".

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Research by Accenture for the World Economic Forum exposes two key challenges facing utilities in the roll out of smart grids.

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