One point three billion
或者
one billion and three hundred million
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thirteen billion
13,000,000,000
&
one point three billion
1.3 billion
billion 英音:['biljən]
美音:['bɪljən] 名词 :十亿
one point three billion。英语中只有千(thousand)百万(million)和十亿(billion)
thirteen million
one point three billion
1.3 billion
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one point three billion(1.3billion)或者one hundred and thirty
million