adeptism

例句：

1. 1. She is an expert in the field of computer programming.
   她在计算机编程领域是个专家。
2. 2. He has a profound understanding of history.
   他对历史有深刻的理解。
3. 3.The student's proficiency in English is impressive.
   这位学生的英语水平令人印象深刻。