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NB的英文翻译是什么意思，词典释义与在线翻译：
英英释义
Noun:
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a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
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a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something;
"the margins of his book were generously supplied with pencilled NBs"
