ppb
美 英
n. 十亿分之几(零件供应中断；程序接线板)
例句
- Add 25 ppb Bentonite and allow to hydrate for a minimum of 6 hrs. 按每桶钻井液加25磅的膨润土，允许水化至少6个小时。
- All drill water to be pretreated with 2 ppb Gluteraldehyde. 所有的钻井水都要按每桶加两磅的戊二醛作预处理。
- The detection limit for surface waters is 0.05 ppb U . 检出下限为0.;05ppb;
- For ISSR marker, 34 polymorphic bands were generated, PPB were 53.0%. ISSR引物共扩增到34条清晰的多态性条带，多态性条带比率为53.;0%25。
- In original English language for the 1st impression.The Net Price to the Publisher is at the ratio 1.6 of the PPB cost. 原书第一次印刷的文字形式是英文。出版者支付的净价依据PPB成本1.;6的比率计算。
- Of these bands, 114 were polymorphic, and the percentage of polymorphic bands (PPB) was 95.00%. 其中，多态性谱带114条，多态性带百分率(PPB)为95.;00%25。
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