These methods are especially beneficial in emerging markets, where prepaid services flourish, but are also applicable to prepaid services in developed ones.

 
  • 這些方法對新興市場(chǎng)尤其有益,因為新興市場(chǎng)的預付費服務(wù)正興盛一時(shí),當然它們對發(fā)達市場(chǎng)的預付費服務(wù)也同樣適用。
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