The thorny problem of chronic procrastination.

慢性拖延，一个棘手的问题。

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The back book of existing customers presents a particularly thorny problem.

现有的顾客名册的背后显示了一个相当棘手的问题。

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Here's a thorny problem: to develop an objective way to rank countries according to the quality of life they offer their citizens.

根据不同国家向其居民提供的生活质量，创造出一种客观的方式对国家进行排名，这是一个棘手的问题。

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Getting the family gaming message out with a song, Rebecca Mayes tackles the thorny problem of balancing technology in the home.

FORBES: Singer Defuses Gaming's "War in the Livingroom" With a Song

As cyber security moves from a purely technical issue to a major business concern, CIOs are faced with the thorny problem of how to best protect their company without over-spending on security.

FORBES: Figuring DDoS Attack Risks Into IT Security Budgets

While our US government, the President and Congress wrestle over the thorny problem of the debt ceiling, our enormous deficit and growing national debt, there is a very serious threat only getting modest attention cyber-threats.

FORBES: What Will You Do When Nothing Works?