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a unit

gen. unit 开头是辅音音素[j]一个单位
A unit
: 101 phrase in 29 subjects
American usage, not spelling1
Automobiles1
Aviation2
Bridge construction1
Business8
Chemistry2
China2
Commerce4
Company name1
Desert science1
Economics19
Electric machinery1
Electronics7
Exhibitions1
Explosives and Explosive Ordnance Disposal1
General8
Insurance1
Metrology3
Name of organization1
Nautical6
Oil / petroleum1
Power electronics2
Project management2
Public security1
Scientific12
Space1
Technology5
Textile industry3
United Nations3