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三级 sān jístresses
gen. три ступени (ранга); трёхступенчатый; третьего ранга; третий разряд
三A级
IMF. рейтинг ААА
三A级: 227 phrases in 30 subjects
American usage, not spelling1
Biology1
Chemistry2
Construction3
Drilling1
Ecology2
Economy2
Education5
Electronics12
Environment1
General107
Geology1
Historical1
Information technology1
International Monetary Fund2
Internet1
Law2
Literally3
Mathematics1
Medical8
Microelectronics2
Military11
Nautical1
Oil and gas1
Radio3
Rail transport1
Sports5
Taiwan1
Technology44
University1