Race - the simplest and most numerous challenge type: follow the checkpoints and the first player across the finish line wins.

通俗角逐-最通俗和最常见挑战类型：顺着搜检点第一辆过终点的车赢。

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The fundamental challenge of teams working collaboratively on any type of specification, regardless of whether it is a set of documents, a set of models, or a code base. is this: controlling change.

在不考虑规范是一组文档、一组模型、还是一个代码库的情况下，对协作工作在任何类型规范的团队来说，最根本的挑战就是：控制变化。

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Perhaps also you have found it a challenge finding exactly the information or type of assistance you needed to get your problem solved.

也许您还发现，找到解决您的问题所需要的确切信息或帮助类型充满了挑战。

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"We've tried to mix experience and youth in the right team to face the type of challenge that Samoa present, " said Kidney.

BBC: Samoa name strong line-up to face Ireland in Dublin

There are teams in the Premier League who can be faced with that type of challenge, not play well and yet still grind out a result.

BBC: Alan Hansen's column

Today while similar movements continue to flourish, they are now being superseded by a new type of minority challenge to national majorities.

CENTERFORSECURITYPOLICY: Islam and the nation-state