小白再看一篇关于全球价值链的文献,有一段实在看不懂:There is an intertwining of i) trade in parts and components; ii) international movement of investment in productions facilities, training, technology and long term business relationships; and iii) demand for services to coordinate this dispersed production, especially infrastructure services such as telecoms, internet, courier, air cargo trade related finance, customs clearance etc.
这个i 、ii 和iii代表什么意思呢?求各位大神指教!


雷达卡




说的很好
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