Using the word add in a sentence. Well, I would add the word add to the sentence by doing this: saying like what does the word Add mean? Well, your question is still a sentence. So anything with the word add is the sentence. Hope this helped.
By cds, I assume you mean compact disks. If so, you need to capitalize CD and add a lowercase s (CDs). No, the two CDs is not a grammatically correct sentence. At the very least, a sentence needs a subject and a verb. You have the subject; you need a verb. Two CDs are stuck in the CD player.
A simple sentence with two verbs: You can wash and dry the laundry. A compound sentence with two verbs: You can do the laundry and I will fold it for you. A complex sentence with two verbs: If there is a will, there is a way.
Its indefinite: Start with 0,1 add last two numbers = 1 add to sequence = 0,1,1 add last two numbers = 2 add to sequence = 0,1,1,2 add last two numbers = 3 add to sequence = 0,1,1,2,3 add last two numbers = 5 add to sequence = 0,1,1,2,3,5 add last two numbers ......... add to sequence ..........