Professionals play an important role, particularly those working in child health and maternity centres.

专业人员可发挥重要的作用，尤其是儿童保健和孕产妇中心的工作人员。

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As well as supporting a multimillion-dollar hunting industry, the lion breeders claim their centres play an important role in conservation.

这些狮子养殖者称，除了支持价值数以百万美元计的狩猎产业之外，他们的饲养中心在自然保护方面也起到了重要的作用。

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They could have even less of a frontline role from June 30 when, as part of a phased withdrawal from Iraq, they begin to pull out from urban centres.

按照阶段性撤军的计划，到6月30日，他们将开始从市中心撤出，美军在前线的角色将进一步减弱。

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Internet and out-of-town shopping present a fundamental challenge to the traditional role of town centres as a places to shop, it says.

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Because of the role that offshore centres play in allowing companies and individuals to avoid, indeed evade, tax, they enjoy powerful backing.

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Mr Lewis published a consultation on the government's regeneration policy on Monday, which says out-of-town and internet shopping pose "a fundamental challenge to the retail-dominated role of our town centres".

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