1. great skillfulness and knowledge of some subject or activity;

   "a good command of French"
   

2. power to dominate or defeat;

   "mastery of the seas"
   

3. the act of mastering or subordinating someone

1.精通;掌握
If you showmastery of a particular skill or language, you show that you have learned or understood it completely and have no difficulty using it.

e.g. He doesn't havemastery of the basic rules of grammar...
他还没有完全掌握基本的语法规则。
e.g. He demonstrated hismastery of political manoeuvring.
他表现出了高超的政治手段。

2.统治;控制
mastery is power or control over something.

e.g. Mesopotamia was probably the first region of the world where humans gainedmastery over major rivers.
美索不达米亚地区可能是世界上人类最早征服主干河流的地区。

1. 精熟：传统的测验需要有相当的长度2.2应用试题应答理论(IRT)之适性测验2.3应用连续机率比例检定模式(SPRT)之适性测验当 Hm假设成立时,即表示达到精熟(mastery)的标准,反之, Hnm假设成立时,表示未达到精熟(nonmastery)的标准.

2. 控制：控制(mastery)系统、社团(combo)系统,决斗&英雄系统 控制(mastery)系统第一项任务 .条件 : 转职的等级220级以上人物,300万钱币 .对象 : 骑士,魔导师,圣射手 .奖励 :