VOA慢速英语:美国军方发布人工智能战略

strategy - n. a careful plan or method for achieving a particular goal usually over a long period of time

approach – n. a way of dealing with something : a way of doing or thinking about something

significant – adj. large enough to be noticed or have an effect

autonomous – adj. able to act independently

drone – n. a kind of aircraft that flies without a pilot

in the loop – n. part of a group that is kept up-to-date with information about something