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 Third Step (Acid Wash) is to remove free iron, metallic residues, oxides, and other corrosion products from the surface of the metal.
牛顿和他的同事们相信促使金属在烧瓶中生长是有可能的，毕竟，众所周知，许多化学反应最后会剩下的树枝状的残渣。
Newton and his peers believed it was possible to prompt metals to grow, or “vegetate,” in a flask. After all, many chemical reactions were known to leave lovely dendritic residues in their wake.
这一复杂的化合物组成的一个协调化合物含有脂肪酸残渣，最多一个RCOO每两个金属原子组。
This complex compound consists of a co-ordination compound containing a fatty acid residue and at most one RCOO group per two metal atoms.
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