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变化速度 biànhuà sùdù
econ. rate of change
tech. velocity of variation; fluctuation velocity
变化 速度
: 55 phrases in 19 subjects
Architecture1
Athletics1
Automobiles3
Aviation8
Business1
Economy3
Electric machinery3
Electronics4
Explosives and Explosive Ordnance Disposal1
Geophysics1
Hydroelectric power stations2
Metallurgy1
Oil / petroleum2
Shipbuilding2
Space6
Technology13
United Nations1
Volleyball1
Wind Energy1

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