part per billion翻译
part per billion的基本解释
读音: 美: 英:
十亿分之一，十亿分率
例句
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。短语
part-per-billion range 十亿分之一级ppb part per billion 十亿分之 ; 十亿分一
ppb -part per billion 可对低浓度
0
纠错
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