5. Charles and David Koch查尔斯和大卫•科赫

　　Charles Koch is reported to possess more than $41 billion. The money he has accumulated throughout the years comes from a wide range of sources. Charles and David Koch took over a business from their father Fred Koch. Both sons have expanded their dad’s business since then. Originally their business was related to oil refining and chemicals.

　　据报道，查尔斯•科赫身价超过410亿美金。这些年他们很多方面积累了这些财富。查尔斯和大卫•科赫从他们父亲雷德•科赫那里继承了公司。这两个儿子从那以后都将他们父亲的生意做得更大了。原本他们的业务只涉及到炼油跟化学品。

　　Now it covers a few other areas and includes commodity trading, fibers, polymers, pollution control technologies, ranching, minerals and fertilizers. Koch Industries is the second largest private corporation in the U.S. The brothers have recently performed business transactions – in 2014 they were also involved in acquiring Oplink, an optical network device company, for $445 million.

　　现在，还涵盖了其他一些领域，包括商品交易，纤维，聚合物，污染控制技术，牧场，矿物质和化肥。科氏工业集团现在是美国的第二大私营企业。这两兄弟最近在执行一项商业交易——2014年的时候，他们同样以445万美金的价格入股了光纤网络设备公司光联通讯设备有限公司。

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（编辑：何莹莹）