billionths的例句（billionths在句子中的用法）

• 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 ).