如何正确使用CCSpriteFrameCache和CCSpriteBatchNode？

I do not understand what I do exactly when I add a CCSpriteFrameCache or CCSpriteBatchNode to my cocos2d application. Can somebody please explain the following points (it would be helpful if you could explain a few; please write the corresponding letter in front of your answer according to which question you are answering):I do not understand what I do exactly when I ad