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of concern stresses
gen.	являющийся предметом беспокойства (Scaramouch); вызывающий беспокойство (Stas-Soleil); вызывающий озабоченность (Stas-Soleil); опасный (Ремедиос_П)
med.	проблемный (Ксения82)

of concern : 318 phrases in 50 subjects

Advertising	1
American usage, not spelling	1
Automobiles	1
Business	6
Chemistry	4
Clinical trial	3
Diplomacy	11
Ecology	9
Economics	4
Education	1
Energy industry	2
Environment	1
Finances	1
Formal	3
General	141
GOST	1
Idiomatic	2
Informal	4
Information technology	1
Latin	1
Law	9
Literature	1
Makarov	27
Mass media	2
Mathematics	13
Medical	6
Military	6
Mining	1
Nautical	1
Nuclear and fusion power	3
Occupational health & safety	1
Oil / petroleum	1
Oil and gas	1
Pharmacology	1
Pharmacy and pharmacology	2
Politics	13
Production	4
Programming	5
Proverb	4
Publishing	1
Quotes and aphorisms	1
Sakhalin	1
Scientific	2
Slang	1
Toxicology	2
Trade unions	1
Transport	2
United Nations	3
Virology	2
Water supply	3