1·Martin Luther King delivered a historic address known as the "I Have a Dream" speech.
马丁·路德·金发表了名为“我有一个梦想”的历史性的演讲。
2·This was a historic leap that even surpassed the humanitarianism of ancient Greece, which was a pioneering idea at the time.
这是一个历史性的飞跃，甚至超越了古希腊的人道主义，这在当时是一种先锋思想。
3·The building has housed some of the nation's most significant diplomats and politicians and has been the scene of many historic events.
这座大楼里住着一些美国最重要的外交官和政治家，许多历史性事件都发生在这里。
4·The astronaut shouldering the historic task will need the help of another astronaut to put on a 120kg, non-powered spacesuit for the extra vehicular activity.
承担此项历史性任务的航天员要先在另一名航天员的帮助下穿上120公斤的无动力舱外活动航天服。
5·This is a historic opportunity for our institutions and the peoples of the world.
对于我们两个机构和全世界人民，这是一个历史性的契机。