The word 'billion' is a noun referring to 'one thousand million' or 'a vast quantity.'
单词 'billion' 是一个名词，指‘十亿’或‘大量’。
| 单词 | billion |
|---|---|
| 发音 | ['bɪljən] |
| 释义 | n. 十亿；大量 |
| 词序 | 613 |
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