today, when i chatted with one of my researching fellower, he said, to write a better scientific paper, one thing should be remembered, which is, in your work, telling us a better idea or better understanding of sb's work. i do agreed with what he said. Actually, we often have little ideas about what we do, so more often, it important to find our own way. surely this is very hard fot most of us. and better understanding needs large mounts of kownledges in the certain fields. we are always puzzled with what we do at hand, a good idea often is regardes to be a flase, for we or our supervisers are often afraid of others suspicious or be a target other one talk about.