5G不是4G的简单升级，而是通信技术的革命性变革。

The true power of mathematics lies in its ability to simplify the complex, making the incomprehensible understandable.

Every life is in many days, day after day. We walk through ourselves, meeting robbers, ghosts, giants, old men, young men, wives, widows, brothers-in-love, but always meeting ourselves.

死者并未死去。他们在记忆中活着。

如果你对每隻向你吠的狗，都停下来扔石头，你永远到不了目的地。