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科技世界 什麼是 3G、4G?有 5G 嗎?

Passengers use their smartphones to surf the Internet in a subway train in Hangzhou city, east Chinas Zhejiang province, China, 5 May 2014.
Passengers use their smartphones to surf the Internet in a subway train in Hangzhou city, east Chinas Zhejiang province, China, 5 May 2014.

馮家杰先生和大家暢談手機網絡科技。


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馮家杰先生和大家暢談手機網絡科技。



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