送交者: 田牛 于 2005-11-09, 13:33:18:
回答: 点小油灯 由 Latino2 于 2005-11-09, 13:06:56:
佛州摸黑进机场，花都点烟入蜜室
洋人钱币收藏家如是说：
Always use non-abrasive cleaners such as rubbing alcohol or olive oil to clean coins. Commercial jewelry and metal polishes are usually too harsh.
为什么 olive oil 和 rubbing alcohol作用相仿？