Some useful web sites:

1. http://www.core.org.cn/OcwWeb/index.htm .

2. http://www.tribology-abc.com/ .

3. www.xitek.com

4. www.doyouhike.net

5. www.8264.com

6. www.kaoyan.com

7. www.hit.edu.cn

8. http://dict.iciba.com/

9. http://www.tianya.cn/index.htm?idwriter=14491163&key=75723450

to be continued...