The Third Step (Acid Wash) is to remove free iron, metallic residues, oxides, and other corrosion products from the surface of the metal.
第三步(酸洗)：去除金属表面的自由离子、金属残渣、氧化物和其他腐蚀产物。
The concentrations of individual free animo acids in heart, brain, lung, stomach, gut liver, spleen, kidney, and muscle tissues from 10 fetuses were determined with amino acid autoanalyser.
作者利用氨基酸自动分析仪测定了10具胎儿尸体的心、脑、肺、胃、肠、肝、脾、肾和肌肉组织中二十余种游离氨基酸的浓度。
When scientists pretreat neurons with this acid in the lab, the cells are significantly (though not completely) protected from free-radical damage. Yup: Coffee is a good source of antioxidants.
科学家在实验室用这种化合物预处理神经元后，神经细胞抗自由基损伤的能力明显增强。没错，咖啡是很好的抗氧化剂来源。
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