President Obama has restricted the conditions under which the United States would consider using nuclear weapons, but stipulated that the limitations do not apply to any potential confrontation with Iran or North Korea.

VOA: standard.2010.04.11

It is not about making the material relevant and easy to apply in given opportunities to do that. It is not about creating interaction in community.

不是整理相关材料,以便于时机适宜时容易,利用，不是,在社群内进行互动。

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