BBC's Analysis editor Ros Atkins looks at the mixed messaging given by President Donald Trump's administration for its actions in Iran.
The seeds of the crisis go back to the late 1970s when Iranian oil workers went on strike and the revolution ushered in the Islamic Republic, Daniel Yergin, vice chair of S&P Global and the author of The Prize: The Epic Quest for Oil, Money and Power, wrote in a Financial Times op-ed this weekend.，更多细节参见新收录的资料
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对创意决策进行事后揣测，是一件危险的事。要从创作中的失误中学习，但不要反复追问「为什么当初要这么做」。更好的问题是：「怎样可以做得更好？」，详情可参考新收录的资料