per trillion翻译

per trillion的基本解释

读音: 美: 英:

每万亿：表示一种极小的浓度或比例，通常用于描述水或空气中的污染物含量。

例句

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。
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。
The concentration of nitrogen trifluoride in the atmosphere is about 0.5 part per trillion, making it very hard to measure.大气中三氟化氮的浓度大约为0.5万亿分之一(ppt)，使得它很难测定。

短语

parts per trillion 兆分之一 ; 万亿分之几 ; 百亿亿分之几
ppt part per trillion 万亿分之
part per trillion 万亿分之一
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纠错

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