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гигиена средыstresses
nat.res. environmental hygiene; environmental health
гигиена среды: 30 phrases in 15 subjects
British usage, not spelling1
Caspian1
Ecology2
Education1
General6
Idiomatic1
Law1
Makarov2
Meat processing1
Medical8
Oil / petroleum1
Road works1
Sakhalin S1
United States1
Weapons of mass destruction2