per billion翻译
per billion的基本解释
读音: 美: 英:
每十亿:表示某种数量或比例在十亿中的数量或比例。
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。In fact, a device using "surface-enhanced Raman spectroscopy" can detect traces of less than one part per billion.实际上,利用“表面增强拉曼光谱”的设备能够检测到十亿分之一的痕量物质。
The Breast Cancer Fund collected 2 samples of 6 different types of food marketed to children, and found levels of BPA ranging from 21 parts per billion (PPB) to 77.5 PPB, with an average of 49 PPB.乳腺癌基金会选取了六种面向儿童市场的食物,并各抽取了两个样本进行研究。研究结果发现这些食物中双酚含量范围为十亿分之二十一到十亿分之七十七点五,平均含量为十亿分之四十九。
短语
parts per billion 十亿分之几 ; 十亿分之一 ; 十亿分率 ; 分之一公克part per billion 十亿分之一 ; 十亿分点 ; 十亿分之…
parts-per-billion 十亿分之一
0
纠错
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