Question

为什么i have a dream 是美国历史上最伟大的演讲

Answer 1

因为它的演讲者，马丁 路德 金是黑人奴隶解放运动的领导者，这个演讲具有划时代的意义，在整个解放运动中具有代表作一样的地位，就好比当年毛主席在天安门城楼上宣布新中国成立一样，这一声宣布就标志着一个新中国的诞生。
道理是一样的，它的演讲起到了关键性的作用，具有历史坐标一样的意义

Answer 2

I am typing very slow in Chinese and if you don't mind, I will Chat with you in English.

Three main reasons that I have a dream is one of the most significiant speeches in the American history:
1. It was given at the most critical time in the history when the racism in Amercia was the most serious social problem. It hit the nail right on the head.
2. It is a masterpiece that combined the common goals for the people who really respect human right and dignity, no matter what his color is.
3. It is simply the beautiful lecture and well presented by Dr King.

In short, it is the best speech to inspire people all around the world to eliminate the racism and discrimination.

Hope this helps. Good luck!

Answer 3

什么叫最伟大呢？没有的事，都是别人道听途说妄加荣誉，不要相信这些主观臆断的事情，伟大可以说，但美国历史还在续写，谁能保证它是最伟大的呢？或许多年之后，奥巴马的YES，WE CAN也会被人说成是最伟大呢。