十亿分之一 (shí yì fēn zhī yī) — one billionth (1/1,000,000,000)

Definition

Examples

• 这种化学物质的浓度只有十亿分之一。
  Zhè zhǒng huà xué wù zhì de nóng dù zhǐ yǒu shí yì fēn zhī yī.
  The concentration of this chemical is only one billionth.
• 他中彩票的概率不到十亿分之一。
  Tā zhōng cǎi piào de gài lǜ bú dào shí yì fēn zhī yī.
  His chance of winning the lottery is less than one in a billion.
• 科学家测量到十亿分之一秒的时间变化。
  Kē xué jiā cè liáng dào shí yì fēn zhī yī miǎo de shí jiān biàn huà.
  Scientists measured a time change of one billionth of a second.