Determining how users will access and use the site is probably one of the most challenging parts of the performance evaluation process.

确定用户将如何访问和使用站点，这大概是性能评估过程中最具挑战性的部分之一。

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For the lodging industry, 2009 was a challenging year, and forecasts indicate that the lodging industry recovery will be a slow and demanding process.

2009年对于酒店行业是充满挑战的一年。各方面的信息显示酒店业的复苏将是一个缓慢而艰难的过程。

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The process of working through a challenging project helps us uncover ingenious ways to move our businesses to new and exciting levels.

完成富有挑战性项目的过程能帮助我们发现一些独创性的方法，将我们的业务推向新的激动人心的水平。

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He had forfeited some money to the government and was in the process of challenging the conviction.

FORBES: Lay Cheats Justice

This has proved to be the most environmentally challenging part of the fracking process.

FORBES: Move up http://i.forbesimg.com t Move down

The further delays had very little to do with the challenging process of making CIGS solar cells as this process was well in place.

FORBES: Solar Founder Responds To Current Chief,