深刻了解

• have a good grasp of

例句

1. 一位成功的政治家是一个对选民有深刻了解的人。
   A successful politician is one who keeps his finger on the pulse of the electorate.
2. 他对于历史背景的深刻了解使他能够详细阐述这场运动的意义。
   His deep knowledge of the historical background enabled him to expatiate upon the significance of the movement.