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mathematics )数学 (of an expression )表情 having two groups of numbers or letters, joined by the sign + or − compare polynomial二项式 Oxford Collocations DictionaryBinomial is used with these nouns:- distribution
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linguistics )语言学 used to describe a pair of nouns joined by a word like ‘and’, where the order of the nouns is always the same, for example ‘knife and fork’ 双名词组(由 and 连接的一对名词,两个名词的前后顺序不变,如 knife and fork)