1， Artificial Intelligence
2, concerned
3, term
4, coined
5, chess
6, checkers
7, expert systems
8, real-life
9, natural
10, neural networks
11, reproduce
12, occur
13, brains
14, robotics
15, sensory stimuli
16, exhibit
17, defeated
18, exclusively
19, proving
20, disciplines
21, recognition
22, widely
23, assembly plants
24, limited
25, tasks
26, great difficulty
27, identifying
28, appearance
29, rudimentary
30, clumsily
2, concerned
3, term
4, coined
5, chess
6, checkers
7, expert systems
8, real-life
9, natural
10, neural networks
11, reproduce
12, occur
13, brains
14, robotics
15, sensory stimuli
16, exhibit
17, defeated
18, exclusively
19, proving
20, disciplines
21, recognition
22, widely
23, assembly plants
24, limited
25, tasks
26, great difficulty
27, identifying
28, appearance
29, rudimentary
30, clumsily