You would use the expression d'accord when you agree with something. For example: Oui, je suis <u>d'accord </u>avec vous. - Yes, I <u>agree </u>with you. It can also translate as sure, okay, of course, naturally, alright, etc.
It made his speech more sentimental and more powerful. To me Dr.King's speech is one of the most influential, stunning, and sentimental speeches I have heard.
If you walk outside your door and look up you'll see that the sky is what's up. It made me put more than "the sky." But there ya go. That is what's up.
