) a sea urchin tooth always on December 27 Bao sharp profound mystery to is always infatuated by scientist

Host:Okay, thankful prosperous clear and bright.(Source:The nations are on-line)
(Responsibility editor:Zhao Ting)
New China net Peking gives or gets an electric shock(reporter, Zhang Jing, ) a sea urchin tooth always on December 27 Bao sharp profound mystery to is always infatuated by scientist.As early as 343 B.C., thou Greece learned a second inside of house and philosopher naturally privates to are much virtuous and then once wrote the book concerning sea urchin.
American scientist finally uncovers riddle bottom.They discover that sea urchin tooth main force hard crystal the softer organic material is always the tooth"beat to whet by one is own" to combine Bao sharp key.This work mechanism probably includes the knife to help to develop to have ego to beat to whet function to have.
The Bao is always sharp