| 释义 |
parts per billion短语⁹⁶⁶⁷⁷⁺⁶
基本例句
十亿分之几,10 亿分率
The test method for determining residual vinyl chloride monomer content in parts per billion level in PVC resin by capillary column gas chromatography headspace technique is suggested.
提出用大口径毛细管顶空进样气相色谱法对聚氯乙烯树脂中十亿分之一级残留氯乙烯含量的测量方法。 chemyq
Though seawater contains only three parts per billion of uranium, mostly in the form of uranyl bicarbonate, the element can be sucked out of it by ion exchange.
虽然铀在海洋中的含量只有十亿分之三，但其中大部分都以三碳酸铀的形式存在，使得铀元素可以通过离子交换吸出。 ecocn |