几何学家

例句：

1. 1. He is a well-known geometry specialist in his field.
   他在他领域里是一个著名的几何学专家。
2. 2. The geometrician's work has revolutionized the field of mathematics.
   这位几何学家的工作已经彻底改变了数学领域。
3. 3. She studied geometry at university and became a professor.
   她在大学学习了几何学，并成为了一名教授。