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手机运营商正在用他们的能力从这个看上去平凡的产品中榨取高额边际利润，利润比得上Vitamin Water和HP(惠普)的打印机墨盒。
The cellphone carriers rival Vitamin Water or Hewlett-Packard and its printer ink cartridges in their ability to extract a high-profit margin from a seemingly mundane product.
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