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efektywny adj.
gen.	efficient
agric.	effective; efficacious
comp., MS	effective (Capable of producing successful results)
nieefektywny adj.
gen.	ineffective

efektywny: 105 phrases in 30 subjects

Accounting	3
Agriculture	3
Analytical chemistry	10
Banking	2
Communications	4
Construction	4
Ecology	1
Economy	6
Electric motors	1
Electronics	2
Energy industry	2
Environment	6
Finances	14
General	4
Health care	2
Law	3
Lighting other than cinema	2
Magnetics	6
Mathematics	5
Microsoft	1
Nuclear physics	4
Obsolete / dated	1
Piezoelectric crystals	4
Radiology	6
Research and development	2
Superconductivity	1
Telegraphy	1
Thermal engineering	1
Transport	3
Welding	1