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основная среда stresses
progr.	primary environment (ssn); production (Belka_me)
tech.	base medium; basic medium

основная среда: 27 phrases in 16 subjects

Antarctic	1
Architecture	1
Audit	1
Biochemistry	1
Biotechnology	1
Ecology	1
Energy industry	2
Finances	1
Mass media	4
Medical	4
Navigation	1
Oil and gas	1
Programming	4
Quality control and standards	1
Sakhalin R	2
Technology	1