单词 | billionth |
释义 | billionth (bɪljənθ ) Word forms: billionths 1. ordinal number The billionth item in a series is the one you count as number one billion. Disney will claim its one billionth visitor before the end of the century. 2. fraction A billionth is one of a billion equal parts of something. ...a billionth of a second. |
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