求翻译：目前该行业有三个潜在的进入者：移动运营商，手机生产商和手机零售商。总体来说，该模式需要整合出一套完整的供应链，由于二手手机不是他们的主营业务，他们并没有相应的竞争优势。另一方面来说，他们投入相同的人力物力，在主营业务上的收益要远远超过投入在该商业模式上的收益。是什么意思？

The industry currently has three potential entrants: mobile operators, handset manufacturers and mobile phone retailers. Overall, the model requires the integration of a complete supply chain, due to second-hand phone is not their main business, they have no corresponding competitive advantage. On t

The industry at present there are three potential entrants: mobile operators, handset manufacturers and mobile phone retailers. Overall, the model needs to integrate a complete supply chain, as a result of 2 mobile phones is not their main business, and they do not have corresponding competitive adv

At present this profession has three potential entrants: Motion operation business, handset producer and handset retail merchant.Generally speaking, this pattern needs the conformity to leave a set of complete supply chain, because two handsets are not their main camp services, they not correspondin

Currently there are three potential entrants in the industry: mobile operators, handset manufacturers and mobile phone retailer. Overall, the model needs to consolidate a set of the complete supply chain, as second-hand mobile phones is not their main business, they do not have corresponding competi

The industry currently has three potential entrants: mobile operators, handset manufacturers and mobile phone retailers. Overall, the model requires the integration of a complete supply chain, due to second-hand phone is not their main business, they have no corresponding competitive advantage. On t