d a doctorate usually based on at least 3 years graduate study and a dissertation; the highest degree awarded graduate study
abbr. 哲学博士学位（Doctor of Philosophy）
1. She is currently pursuing a PhD in psychology.
她目前正在攻读心理学博士学位。
2. Earning a PhD can take several years of hard work.
获得博士学位可能需要几年的努力。
3. Many universities offer funding for PhD students.
许多大学为博士生提供资金支持。