editing

Hi guys, I have added some information on this part. In order to connect to the excellent work you guys have done, I have to change or delete a few words, I hope it is ok and apologize for that. And please don't be hesitated to edit my work if anyone hold different opinions. cheers~

So much excellent information on this page! A lot of good points. I have run through and done some general editing on this page to make certain points more clear.

Hi all, Just added some citations and edits to what I contributed! Thanks!