这些都是一个成功的协议所要求的强有力的国家行动。
These are the kind of strong national actions that a successful agreement requires.
一项成功的协议取决于若干核心因素，其中有两项已确定为必不可少：首先，所有的主要经济体应制定强有力的国家行动方案并决心付诸实施；
A successful agreement depends upon a number of core elements, but two are shaping up to be essential: first, that all major economies set forth strong national actions and resolve to implement them;
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