英语听力精选进阶版 14319（在线收听）

UN discusses 'killer robots'

Vocabulary

drones

aircraft which are controlled by people on the ground

warfare

the activity of fighting a war

lethal

causing death

autonomous

independent, able to make its own decisions

out of the decision-making loop

not part of the process of making decisions

ethics

set of beliefs or principles that tell people what is right and wrong

ratified

made (an agreement become) official

blinding

causing blindness (not able to see)