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n.十亿 ；数以十亿计；大量； 双语释义：n.(名词)[C]one thousand million; 1,000,000,000; 109十亿英英释义： billion[ 'biljən ]n.the number that is represented as a one followed by 12 zeros; in the United Kingdom the usage followed in the United States is frequently seen同义词：one millio
