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系统行动
econ.
behavior of system
系统行动:
156 phrases
in 24 subjects
Air defense
1
Automobiles
8
Aviation
62
Communications
3
Desert science
1
Earth sciences
1
Economy
2
Electronics
15
Finances
2
General
2
Hydroelectric power stations
1
Information technology
1
Missiles
1
Name of organization
5
Nautical
1
Nursing
1
Rail transport
1
Securities
9
Shipbuilding
1
Space
24
Sports
1
Technology
9
Telecommunications
1
United Nations
3
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