名詞 mastery:

1. great skillfulness and knowledge of some subject or activity
   同義詞：command, control
2. power to dominate or defeat
   同義詞：domination, supremacy
3. the act of mastering or subordinating someone
   同義詞：subordination

1. Her mastery of economic theory impressed the professors.
   她對(duì)經(jīng)濟(jì)的精通給教授們留下了深刻的印象
2. He demonstrated a mastery of Arabic.
   他顯示了對(duì)阿拉伯語(yǔ)的精通。
3. Which side will get the mastery?
   哪一方將獲得控制權(quán)？

mas.ter.y

n.（名詞）
【復(fù)數(shù)】 mas.ter.ies
Possession of consummate skill.
優(yōu)勢(shì)：熟練技藝的擁有
The status of master or ruler; control:
統(tǒng)治；控制：
例句：
mastery of the seas.
對(duì)海域的統(tǒng)治

Full command of a subject of study:
對(duì)一技藝的完全精通：
例句：
Her mastery of economic theory impressed the professors.
她對(duì)經(jīng)濟(jì)的精通給教授們留下了深刻的印象