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人工试验
busin.
labor test
人工 试验
:
31 phrases
in 15 subjects
Automobiles
5
Aviation
1
Business
2
Chemistry
2
Earth sciences
1
Ecology
1
Electricity generation
1
Explosives and Explosive Ordnance Disposal
1
Geophysics
1
International trade
1
Metallurgy
1
Plastics
1
Polymers
1
Space
1
Technology
11
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