billionths是什么意思？

billionths

十亿

例句

• The materials do not occur naturally but a nano scale, measured in billionths of a metre. 这种材料不是天然存在的,而是以纳米量级(十亿分之一米)研发而成.
• That's still a few billionths of the fractional pressure changes your ear can detect. 而这仍然只有你的耳朵能探测到的压力变化的几十亿分之一.
• The an emulsion of droplets between 100 and 300 nanometres ( billionths of a metre ) across. 这些微粒仅宽100—300纳米 ( 一米的十亿分之一 ).

柯林斯高阶英汉双解学习词典释义

• ORD
  第十亿（个）
  The billionth item in a series is the one you count as number one billion.
  例句
  Disney will claim its one billionth visitor before the end of the century. 迪士尼的游客在本世纪末将会超过10亿。
• FRACTION
  十亿分之一
  A billionth is one of a billion equal parts of something.
  例句
  ...a billionth of a second. 十亿分之一秒