名詞 proficiency:

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

1. Any of12 levels of proficiency at the grade of black belt in martial arts such as judo and karate.
   段在東方武術(shù)中，黑腰帶的級別精通達(dá)12級中的任一級，如柔道和空手道

pro.fi.cien.cy

n.（名詞）
【復(fù)數(shù)】 pro.fi.cien.cies
The state or quality of being proficient; competence.
熟練，精通：熟練的性質(zhì)或狀態(tài)；內(nèi)行