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Delta n n =
environ.	delta

delta: 69 phrases in 17 subjects

Chemistry	4
Communications	2
Earth sciences	4
Education	1
Electronics	3
Finances	11
Food industry	3
General	1
Health care	8
Information technology	3
Life sciences	1
Mathematics	8
Medical	10
Metallurgy	1
Statistics	6
Technology	1
Transport	2