mastery
/ˈmɑ:stərɪ; `mæstərɪ/ n[U]
1 ~ (of sth)(complete) knowledge; great skill 精通; 熟练
demonstratea mastery of Arabic 显示对阿拉伯语的精通
She showedcomplete mastery in her handling of the discussion. 她处理这种辩论表现得应付裕如.
2 ~ (over sb/sth) control 控制
Which side will get the mastery? 哪一方将获得控制权?
gain mastery (over an opponent) 占上风（超越对手）.