Question:

　　Dear Ms ABC:

　　I have seen a sentence like this "It's co-written by professors of Ph.D.education bases of Criminal Law from Renmin University of China and Wuhan University".

　　I want to know what does the "Ph.D." mean? Thank you very much.

　　With best wishes,

　　Yours Linda

　　Answer:

　　Dear Linda,

　　"Ph.D." means Doctor's degree of philosophy.

　　Yours abc