Learners use of the definite article is an important index of their English language proficiency.
定冠词使用是表明学习者英语水平的一个重要指标。
Certificate of foreign language proficiency-original and one copy.
外语水平证明原件及复印件。
Only through constant practice, can we improve our language proficiency quickly.
只有不断练习，才能迅速提高语言的应用能力。
Finally the subjects took a language proficiency test.
最后，这些实验对象们参加一次语言水平测试。
Final graduation and Language proficiency certificates.
最高学历证明和语言能力证明。
Language proficiency is an important factor determining the use of the knowledge sources.
语言能力是决定知识资源运用的重要因素。
Language proficiency is an important factor determining the use of the knowledge sources.
语言能力是决定知识资源运用的重要因素。
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