grads

例句：

1. 1. He earned his doctoral degree in physics.
   他获得了物理学博士学位。
2. 2.The company has a hierarchy of ranks and responsibilities.
   公司有一套等级和责任体系。
3. 3. She is ranked as one of the top ten scientists in her field.
   她被公认为该领域排名前十的科学家之一。