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负-正-负-正
avia. negative-positive-negative-positive
负-正-负-正
: 184 phrases in 34 subjects
Agriculture3
Air defense1
Automobiles10
Aviation14
Bridge construction4
Business2
Chemistry2
Computer numerical control1
Computers2
Earth sciences3
Economy6
Electric machinery3
Electronics19
Explosives and Explosive Ordnance Disposal1
General19
Genetics3
Geophysics3
Information technology2
Logistics1
Management1
Marketing1
Mathematics5
Metallurgy5
Oil / petroleum5
Project management1
Securities2
Space4
Sports3
Technology47
Telecommunications6
Tennis2
Textile industry1
Transport1
Wind Energy1