part per billion 10亿分之…;

DON amounts of various components were in the range of 2900~18670 ppb during milling process.
制粉过程各组分DON含量在2900~18670ppb之间.
来源:互联网摘选It'shows that 0.2 ppb of Ag + can be quantitatively absorbed from aqueous solution sample.
水样中0.2ppbAg~+可定量被吸附.
来源:互联网摘选As for drilling mud but made up with 35 ppb Bentonite to 100 + vis.
对钻井液,按每桶35磅比例加入膨润土,使粘度达到100秒.
来源:互联网摘选Sulfinert coating provides stable storage of sulfur and mercury at ppb levels in petroleum samples.
硫钝化的涂层为采样罐提供了稳定的性能,可以储存PPB级的含硫样品.
来源:互联网摘选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.
来源:互联网摘选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%.
来源:互联网摘选
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