 |
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| relative retention | |||
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相对 保持 : 12 phrases in 8 subjects |
| Agriculture | 2 |
| Electronics | 1 |
| Finances | 2 |
| Geophysics | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Sports | 2 |
| Technology | 2 |
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