1、
the study of determination of cerium(ⅲ) in weak acid medium by fluorescence spectrophotometry
弱酸性条件下铈（Ⅲ）的荧光分光光度测定法
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2、
offset printing plates used in the base is aluminum, which is strong, weak acid medium are unstable.
胶印洋搁置的印版版基是金属铝，它在不弱酸、弱酸介质洋均不安定。
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3、
