parts per billion翻译

parts per billion的基本解释

读音: 美: 英:

十亿分之几

例句

It works at a very low concentration-10 parts per billion-so you can't smell the compound.这种物质在极低浓度下(10ppb)就可以发挥作用，因此，你是闻不到这种物质的。
Wasps can smell chemicals in concentrations as tiny as a few parts per billion in the air.黄蜂能够嗅出极小浓度的化学成份，哪怕它们在空气中的含量是十亿分之几个单位。
His proxies also argued that, as the current legal ozone limit-75 parts per billion-was up for review in 2013, it anyway made sense to delay reducing it.他的代理人也指出，由于现在的法定臭氧限制是十亿分之七十五的浓度，已经足以应付2013年的审核，这无论如何都会帮助推迟臭氧量的减少。

短语

parts-per-billion 十亿分之一
parts per billion range 十亿分之几级
equivalent parts per billion 微克当量
0
纠错

相关推荐：