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thinkpad t490s值不值得买?thinkpad t490s商务轻薄本
联想thinkpad t490s(i5-8265u, 低功耗fhd)笔记本电脑
各种机型升级2k 以及4k 广色域屏幕,新增x1c 2019/t490/t490s
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