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Open the section "Definition and Classification of Gems" under the section "Overview of Gem Processing and Materials", Only in the video, associate professor Liao wangchun of the jewelry department of Jinling institute of science and technology explained: there are 45 varieties of natural gemstones, 32 varieties of natural jade, 9 kinds of available and national standard named organic gemstones, and the most important types of artificial gemstones are synthetic gemstones, artificial gemstones, pieced gemstones and recycled gemstones...却连一个小火长也不如了。　　但丁志明的生存之道，不知為何，竟被那个前来专访的方佳莹破坏殆尽。韩瀛珠到京城状告洪顺为父报仇，得伯建相助，将洪顺伏法。伯建、仲豪都钟情于瀛珠，瀛珠照誓约下嫁伯建。仲豪失落，对王权产生渴望。另一方面，马和红颜知己桑青(吴美珩)之间的距离，亦因着他要实现自己的理想而越来越大……都敬秀确定为<百日的郎君>主人公。”都敬秀在剧中扮演元德（李律），一位一举一动都丝毫不乱的完美世子。是个心狠手辣的人，希望成为完美主义者，但是因为杀手的攻击而受伤，从悬崖上掉落后，莫名其妙成为了元德。元德是无论在哪方面都用不上的男孩，从李律变成元德后他的世界发生了天翻地覆的变化。<百日的郎君>以世子失踪事件为背景，是一部悬疑爱情剧。以为已经去世的世子在100天后再次回到宫中，究竟这途中发生了什么事情，令人好奇。该剧目前正与tvN商议编排时间中。For example, the above is only a simple literal quantity structure. All member variables above are accessed through Singleton, but it is not a single mode. Because the monomer pattern has a more important feature, that is, it can be instantiated only once. The above is only a class that cannot be instantiated, so it is not a monomer pattern. Object literal quantity is one of the methods used to create a single pattern;