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极区
gen. aporium
agric. polar area (area polaris)
avia. polar region (地球两极附近的区域,无确定界限)
desert. polar zone
el.mach. pole region
space polar region
极区: 221 phrases in 36 subjects
Agriculture8
Air defense3
Animal husbandry2
Automobiles5
Aviation3
Baseball1
Biotechnology1
Business2
Chemistry3
China2
Desert science8
Drilling1
Earth sciences16
Ecology5
Electronics22
Environment2
Explosives and Explosive Ordnance Disposal1
Fishery fishing industry1
General12
Geology1
Geophysics1
Golf2
Hydroelectric power stations1
Life sciences3
Mathematics1
Metallurgy10
Nautical4
Navigation1
Oil / petroleum8
Physics1
Shipbuilding5
Space20
Technology57
United Nations3
United States1
Wrestling4