Zhu said some trains on the Bejing-Zhangjiakou line are "smart" as they provide 5G signals and wireless charging for passengers, as well as intelligent lighting.
朱说北京到张家口线上的一些火车很“智能”。车上有 5G 信号覆盖，为乘客提供无线充电以及智能照明。
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Charging towards the finish line, Bolt has his eye on the clock all the way and once again celebrates his triumph in style — this time, after he completed his run.
The voltage charged on transmission line will be unstable when capacity of transmission line is very low and the charging voltage is high. It then influences the stability of the output pulse.