You learn to do something, then we must try to learn, I do not like you learn scanty, but sometimes it seems no matter how hard you still the case, in that case you have no way, in fact, I see that I to my friends in learning Light tent, I said at the time to learn photography Light tent not have to learn to do, he said, you do not know how hard Light tent for me, my other are doing very good, but it is Light tent mastered well, I do not know how to do, I think my friend for his own shortcomings is very understanding, but I feel like I would not have that kind of consciousness, I do not know how to engage.