We have taken hours km system.

我们采取小时公里制。

youdao

A hurricane or typhoon is a system with sustained winds of at least 33 metres per second(119 km/h).

飓风/台风是指风速至少达到33米/秒（119千米/时）的风暴系统。

youdao

Even if the object is 40-50 km above the ground it will be annihilated with the system that leaves no chances for survival.

即使目标在离地面40 - 50千米的高空也会被该系统摧毁，无所遁形。

youdao

Bangkok's new Skytrain, a mere 23-km system, is already credited with improving traffic by about 4%.

CNN: The Best Transport

In China, Beijing is adding 13.5 km to its existing system, compared to 23 km in Guangzhou and 27 km for Shanghai.

CNN: The Best Transport