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读者来信:最近频繁从媒体上看到“3G”这个名词,请问,“3G”和我们现在使用的手机究竟有什么不同?有哪些优点呢?
Letters from readers: Recently, we have frequently seen the term “3G” from the media. Excuse me, what are the differences between “3G ” and the cell phones we use now?