the science and technology of the electronic devices used in aeronautics and astronautics

Avionics forms an important part of the defence industry. 航空电子技术是国防工业的一个重要组成部分。

the electronic devices of an aircraft or spacecraft

The sophisticated avionics enable the helicopter to operate at night. 先进的航空电子设备使得这架直升机可以在夜间飞行。