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系统分组
busin. block separation of system
commer. systematical grouping
tech. hierarchic classification; hierarchical classification; systematic grouping
系统分组
: 61 phrases in 17 subjects
Agriculture1
Aviation5
Chemistry3
Computer networks1
Computers1
Desert science1
Earth sciences1
Electronics22
General1
Information technology2
Metallurgy1
Refrigeration1
Securities1
Space5
Statistics2
Technology11
Telecommunications2