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周期 zhōuqī
gen.	ciclo m; periodico m
math.	periodo m

周期: 62 phrases in 18 subjects

Automatic control	1
Biology	1
Botany	1
Cables and cable production	2
Commerce	1
Corporate governance	4
Economy	1
Electric machinery	2
Electricity generation	1
Electronics	3
Environment	5
General	1
Mathematics	14
Nuclear physics	4
Patents	3
Power system protection	1
Statistics	16
Welding	1