proficiency

名词 proficiency:

1. the quality of having great facility and competence
2. skillfulness in the command of fundamentals deriving from practice and familiarity
   同义词：technique

1. Any of12 levels of proficiency at the grade of black belt in martial arts such as judo and karate.
   段在东方武术中，黑腰带的级别精通达12级中的任一级，如柔道和空手道

pro.fi.cien.cy

n.（名词）
【复数】 pro.fi.cien.cies
The state or quality of being proficient; competence.
熟练，精通：熟练的性质或状态；内行