WEBSTER'S REVISED UNABRIDGED DICTIONARY OF THE ENGLISH LANGUAGE
G.& C. MERRIAM COMPANY2222 年出版2026 页ISBN：
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G.BELL AND SONS LTD1953 年出版956 页ISBN：
The New Collins concise dictionary of the English language
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THE PRESENT PERFECT IN NON-NATIVE ENGLISHES:A CORPUS-BASED STUDY OF VARIATION
JULIA DAVYDOVA2011 年出版340 页ISBN：
