我自己感觉,polish的意思更倾向于有物理打磨(或者说擦)的过程,而clean是总体上说清洗。 看NGC的解释(位于Improper Cleaning,不适当清洗类别下): POLISHED is similar to BURNISHED, though it’s typically applied when the abrasive action is less severe. BURNISHED is the term used when the cleaning is more aggressive and gives the coin a very brilliant but unnatural sheen. Sometimes this action is performed with some abrasive media such as ball bearings, or it may result from treatment within a rock tumbler. Burished用来描述清洗程度很强烈,使得硬币看起来闪光,但是光泽不自然。有时这种清洗方式是通过摩擦完成的。。。(举例的ball bearing不知道是一种什么方式,后面举例就不翻译了) POLISHED 与 BURISHED类似,一般用于摩擦不那么明显的硬币。