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测高点 : 40 phrases in 11 subjects |
| Agriculture | 2 |
| Air defense | 6 |
| Aviation | 1 |
| Business | 1 |
| Earth sciences | 2 |
| General | 4 |
| Oil / petroleum | 1 |
| Oil processing plants | 1 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 20 |
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