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efektywność f
gen.	effectiveness
math.	efficiency
efektywność n
agric.	efficacy; efficaciousness

efektywność: 80 phrases in 18 subjects

Construction	8
Economy	6
Education	2
Electronics	1
Energy industry	17
Environment	11
Finances	3
General	2
Mathematics	14
Mechanic engineering	1
Medical	1
Microsoft	2
Obsolete / dated	1
Politics	1
Statistics	4
Technology	2
Telegraphy	1
Transport	3