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单词 parts per trillion
释义
parts per trillion
  • 简明释义
  • 兆分之
  • 网络释义
  • 1

    ?兆分之一

    -感应度:烟雾:兆分之一parts per trillion)、粒子:皮-奈等级(pg-ng levels) -选择性:少于1%的伪阳性(false positive)

  • 2

    ?万亿分之几

    ... 按体积计算万亿分之一 pptv 万亿分之几 parts per trillion; ppt 十亿分之一 part per billion ...

  • 3

    ?百亿亿分之几

    ... 万亿分之一 part per trillion; ppt; trillonth 百亿亿分之几 parts per trillion 十亿分之几级 parts per billion range ...

短语
  • 双语例句
  • 1
    We have an ability to smell incredibly small concentrations, down to as little as two parts per trillion.
    人类可以闻到微小浓度的物质,哪怕浓度小到一万亿分之二。
  • 2
    The bees can detect the target chemicals in the air in concentrations as low as a few parts per trillion.
    而且蜜蜂能觉察到空气中浓度仅万亿分之一单位的特定化学物质。
  • 3
    Still widely used, this electronic nose is able to sniff out a few parts per trillion of chemicals found in the soil, water or air.
    这种仪器直至今天仍然广泛使用,它可以从土壤、水或空气中发现的数以万计的化学物中嗅到一部分(需要的)的东西。
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更新时间:2025/2/12 2:14:55