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| external bond | |||
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外结合 : 13 phrases in 9 subjects |
| Agriculture | 1 |
| Aviation | 2 |
| Business | 3 |
| Construction | 1 |
| Genetics | 2 |
| International trade | 1 |
| Metallurgy | 1 |
| Molecular genetics | 1 |
| Surgery | 1 |
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