有些文章是出于保存有用资料目的转载到本站。这些文章包含”//from url address“字样标明源链接。对于转载的内容，一切权利归原作者所有。
Some articles are copied to here which all contains “//from url address“. They are copied because they are great and useful to me and I do not want to lose those valuable information. All rights belongs to their authors.
Thanks for their knowledge and work!