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强制性的
busin.	mandatary
dril.	imperative
econ.	mandatory
sport.	obligatory
tech.	compulsory
telecom.	compelling

强制性的: 26 phrases in 15 subjects

Aviation	3
Business	2
China	1
Commerce	1
Economy	3
Finances	3
International Monetary Fund	1
International trade	5
Nautical	1
Securities	1
Shipbuilding	1
Technology	1
Textile industry	1
United Nations	1
United States	1