Whereas the cometary samples are relatively easy to extract from the collector plates, that is not the case for the interstellar dust samples.

与从收集盘相对容易的提取出彗星样品不同，星际尘埃要困难得多。

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Description: Collector Jack Chen of Washington collects passenger, motorcycle, and special graphic plates, as well as plates of 1976.

陈光正制作，蒐集美国的汽车及摩托车车牌，并提供图片、介绍及相关连结。

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"While their official role is law enforcer, tax collector and advertiser, license plates moonlight as reporters, artists, sociologists, historians, psychologists and statisticians, " he says in the opening of his book, A Moving History.

FORBES: Collecting