Man-made diamonds are nothing new--industry started making them in the 1950s, and each year about 80 tons of low-quality synthetic diamonds are used in tools like drill bits and sanders.
Synthetic though the row over pay has been, it has underlined how difficult it is for any one country to press ahead alone with measures to constrain the industry.
尽管一直以来薪酬之争是人为的，但它凸显了对于任何一个国家想推进对金融业的监管是多么困难。
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Along with screen packs, the synthetic fiber industry utilizes gaskets and seals with each pack configuration.