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upper level
agric. 上层; 高水位
el. 高位
geol. 上部层位
tech. 高能级; 上部水平
upper-level ['ʌpəˌlεvl, 'ʌpərˌ-]
gen. 高空; 上部水平〔平卷〕
upper- level: 50 phrases in 16 subjects
Aviation1
Bridge construction1
Business1
China1
Climatology1
Desert science3
Electronics8
Explosives and Explosive Ordnance Disposal1
General1
Hydroelectric power stations6
Metallurgy3
Rail transport1
Space2
Sports1
Technology17
Wind Energy2