The auto industry added safety devices like seat belts and air bags.

汽车业增加了安全带和安全气囊等安全装置。

Radio frequency bandwidth is limited, yet we are still trying to add more new devices to it.

无线频段是有限的，而我们仍在试图添加更多新设备。

You're probably better off adding some mind control device so you can get the bears to do whatever you want.

你最好添加一些精神控制装置，这样你就可以让熊做任何你想做的事。