Mr Simes said that although the agreement itself was signed three years ago, we all know the devil is in the detail, and we know how many such agreements in principle never come to final fruition. 西梅斯表示,虽然议定书本身已于三年前签署,但我们都知道关键在于细节,也知道有多少类似的原则协议最终不了了之。