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關注：1
2013-05-23 12:21
求翻譯：It costs four times as much to gain a new client as it costs to keep an old one是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
It costs four times as much to gain a new client as it costs to keep an old one
問題補充： |
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