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剑桥词典 Cambridge Dictionary
The most popular dictionary and thesaurus for learners of English. Meanings and definitions of words with pronunciations and translations.
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牛津词典 Dictionary.com
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数十万条目的缩略词 The Web's largest and most authoritative acronyms and abbreviations resource.
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英语成语和俚语集合 The largest dictionary of idioms and phrases currently in use in British, American and Australian English. Over 12,000 phrases and expressions.
美国当代语料库 English Corpora: most widely used online corpora. Billions of words of data: free online access
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