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periodic variation | |||
periodic movement | |||
cyclical movement; oscillatory movement; oscillation; cyclical fluctuation |
周期变 动 : 26 phrases in 11 subjects |
Aviation | 2 |
Business | 1 |
Economy | 1 |
Electronics | 1 |
General | 1 |
International trade | 3 |
Mathematics | 1 |
Securities | 1 |
Space | 1 |
Statistics | 6 |
Technology | 8 |