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| back to square one | |||
| back up | |||
| 积滞: 43 phrases in 14 subjects |
| Animal husbandry | 2 |
| Architecture | 1 |
| Bridge construction | 1 |
| Chemistry | 1 |
| Desert science | 1 |
| Ecology | 1 |
| Electronics | 2 |
| Engineering geology | 2 |
| General | 2 |
| Geology | 1 |
| Oil / petroleum | 9 |
| Space | 1 |
| Technology | 17 |
| Textile industry | 2 |