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| Research & Development | |||
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研究和开发 : 74 phrases in 16 subjects |
| Automobiles | 2 |
| Aviation | 7 |
| Earth sciences | 34 |
| Ecology | 1 |
| Economy | 2 |
| Electronics | 5 |
| Geology | 2 |
| Mechanics | 1 |
| Name of organization | 4 |
| Navigation | 1 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Shipbuilding | 1 |
| Space | 5 |
| Technology | 6 |
| United States | 1 |
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