noun
billion
/'biljәn/
billion 是什么意思
十亿，十亿个
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 the number that is represented as a one followed by 9 zeros denoting a quantity consisting of one thousand million items or units in the United States denoting a quantity consisting of one million million items or units in Great Britain.
词性
noun
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进阶
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