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主族
chem.
main group
;
subgroup A
主
A
族
construct.
subgroup A
周期表
主族
math.
main group
主族
:
52 phrases
in 11 subjects
Business
3
China
11
Dermatology
4
Economy
9
General
17
Genetics
1
International trade
1
Librarianship
1
Metallurgy
1
Technology
2
United Nations
2
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