1N-COUNT （哲学）博士学位 A PhD is a degree awarded to people who have done advanced research into a particular subject. PhD is an abbreviation for 'Doctor of Philosophy'. （哲学）博士学位
He is more highly educated, with a PhD in Chemistry.
他受过更高的教育，拥有化学博士学位。
...an unpublished PhD thesis.
未发表的博士论文
2（用于人名后）…博士PhD is written after someone's name to indicate that they have a PhD. （用于人名后）…博士