英语翻译When you don't know _____ _____ _____ a word,you'd better _____ it _____ _____ a dictionary.
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英语翻译
When you don't know _____ _____ _____ a word,you'd better _____ it _____ _____ a dictionary.
the meaning of look up in
when you don't know how to use a word, you'd better look it up in a dictionary.