然而将金砖四国(或者任何其他新兴力量的组合)视为一体是否有意义？

But does it make sense to treat the brics-or any other combination of emerging powers-as a block?

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即便是从理论上，不同退出战略的正确政策组合也是因国而异的，取决于各国所处的境况。

Even in theory, the right mix of policies in any exit strategy ought to differ from place to place, depending on the circumstances.

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世卫组织及其伙伴对流感进行全球性监测，每年建议一种季节性流感疫苗组合，并支持会员国为制定预防和控制战略作出的努力。

WHO, with its partners, monitors influenza globally, annually recommends a seasonal influenza vaccine composition, and supports Member States efforts to develop prevention and control strategies.

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