1. 名詞
   不可數名詞: 精通
   熟練
   proficiency in ...(語言、技能等):
   對...的精通
   對...的熟練
   proficiency in ...(動詞ing ...):
   對做...的精通
   對做...的熟練
   不可數名詞:
   real proficiency:
   

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   同義字詞
   command,IQ,mastership,mastery
   experience,expertise,know-how,savvy,skills
   

例句

1. He also plays golf, though with less proficiency .
2. Proficiency in speaking is universally prestigious.
3. We 23 divide language proficiency into two categories.
4. He taught me some proficiency in games at the same time.
5. English proficiency varies greatly across the continent.
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