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關(guān)注：1
2013-05-23 12:21
求翻譯：The history of mobile telephones can be broken into four periods. The first (pre-是什么意思？ 待解決
 懸賞分：1
- 離問(wèn)題結(jié)束還有
The history of mobile telephones can be broken into four periods. The first (pre-
問(wèn)題補(bǔ)充： |
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