Different concentrations of a set of alcohol solution were measured experimentally; the system measurement error is no more than 0.02 %.

对一组不同浓度的酒精溶液进行了测量实验，浓度测量绝对误差小于0.02%。

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To the isopropyl alcohol this kind of substrate ingredient rich sample, the determination method using direct caused the result insufficiently to be ideal, and the remarkable system error.

对异丙醇这类基体成分丰富的样品测定，采用直接上机进样测定的方法使结果不够理想，而且存在显著的系统误差。

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After months of congressional investigations, the Justice Department had acknowledged that its agency, the Bureau of Alcohol, Tobacco, Firearms and Explosives, made a serious tactical error in allowing guns to be purchased by straw buyers and then smuggled across the border to drug cartels.

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