剧情简介:This program explains the formation, chemistry, variations and allure of the most notable gemstones; diamonds, emeralds, sapphires, rubies, jade and opals.
剧情简介:在线播放地址:http://www.easyaq.com/video/1245.htmlHorizon meets the two men who uncovered Stuxnet, the pioneers of ultra-paranoid computing, a white-hat hacker who showed out how to hac k into stand alone cash machines, and explains how companies test resilience.