proficiency

訳語

1. 習熟しゅうじゅく
2. 熟練じゅくれん
3. 力ちから
4. お上手おじょうず

英語の定義

1. the quality of having great facility and competence

例文

• The letters STEP stand for the Society for Testing English Proficiency.
• He has increased his proficiency in English greatly.

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