I believe that I speak for every sincere and serious representative in the United Nations — so I am encouraged to believe by the speeches to which we have already listened this morning — when I say that the anniversary must be an occasion for an honest assessment of our failures in the past, matched by an equally determined will to do better in the future, so that we can escape from frustration and turn the anniversary into an inspiration and an achievement.

请老师们看看so该如何理解？