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period of availability | |||
term of validity | |||
tenn of validity; time of effect | |||
effective duration | |||
duration of validity |
有效期间 : 14 phrases in 7 subjects |
Business | 3 |
China | 1 |
Economy | 3 |
General | 1 |
International trade | 2 |
Project management | 2 |
Technology | 2 |