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| two-stage; two-level | |||
| two-step | |||
| double-stage | |||
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| two-stage | |||
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| double-stage | |||
| 两级的: 8 phrases in 8 subjects |
| Agriculture | 1 |
| Artificial intelligence | 1 |
| Automobiles | 1 |
| Aviation | 1 |
| Oil / petroleum | 1 |
| Securities | 1 |
| Technology | 1 |
| Telecommunications | 1 |
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