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oldest old 80 years or more
UN	最老的老人

oldest old: 900 phrase in 86 subjects

Advertising	5
Agriculture	56
Air defense	2
Animal husbandry	13
Architecture	4
Audio electronics	1
Automobiles	11
Basketball	1
Biology	16
Botany	3
Bridge card game	2
Bridge construction	6
Business	56
Ceramics	2
Chemistry	2
Chess	5
China	15
Commerce	7
Computers	1
Construction	3
Dancing	2
Dentistry	3
Dermatology	1
Desert science	29
Drilling	9
Earth sciences	7
Ecology	1
Economy	53
Electronics	9
Engineering geology	9
Entomology	6
Environment	3
Exhibitions	3
Explosives and Explosive Ordnance Disposal	4
Finances	13
Forestry	1
Furniture	1
General	91
Genetics	3
Geology	5
Geophysics	1
Household appliances	1
Human resources	1
Humorous / Jocular	2
Hydroelectric power stations	14
Ichthyology	1
Informal	2
International trade	20
Labor law	3
Librarianship	8
Life sciences	1
Management	5
Marketing	1
Metallurgy	18
Mining	3
Molecular genetics	3
Multimedia	1
Mycology	1
Nursing	14
Oil / petroleum	11
Perfume	1
Pharmacology	2
Polygraphy	7
Project management	3
Rail transport	1
Reproductive biology	2
Rude	3
Securities	9
Selective breeding	1
Shipbuilding	3
Skiing	2
Skydiving	1
Slang	6
Soil science	1
Space	2
Sports	12
Technology	197
Telecommunications	6
Textile industry	46
Toys	1
Transport	2
Typography	2
United Nations	7
University	1
Veterinary medicine	6
Wushu	1