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中心城市 zhōngxīn chéngshì
gen.	metropolis
commer.	major city
desert.	central city
tech.	core city; hub city; key city; mother city

中心城市: 54 phrases in 15 subjects

Advertising	1
Bridge construction	1
Business	4
Earth sciences	3
Ecology	1
Economy	4
Electronics	2
Environment	1
General	7
International trade	1
Management	1
Name of organization	2
Planning	1
Rail transport	1
Technology	24