国家对高涨的粮食价格和食品短缺作出的反应是，进一步努力提高粮食自给能力和重新建立公共储备。
Countries have been responding to high food prices and grain scarcity by scaling up efforts to achieve grain self-sufficiency and rebuild their public reserves.
储备货币是一种有成本的全球公共商品。
Reserve currency status is a global public good that comes with a cost.
对公共部门而言，这一挑战会影响干预货币、储备货币和钉住货币的选择。
For the public sector, this challenge affects the choices of intervention currency, reserve currency and pegging currency.
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