wallet digital currency, Featured snippets

1. Adaptability challenges in complex environments3. Efficient logistics support needs1. UAV: the eye of the air in coastal defense and frontier defense.

1. Monitoring requirements in a wide area3. Unmanned shops, hotels and banks: the service guarantee of frontier islands.2. Security and confidentiality issues

2. Task execution in dangerous environment3. Unmanned shops, hotels and banks: the service guarantee of frontier islands.