 |
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| areal distribution | |||
| area distribution | |||
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| regional distribution | |||
| 区域分布: 16 phrases in 12 subjects |
| Air defense | 1 |
| Animal husbandry | 1 |
| Desert science | 1 |
| Earth sciences | 1 |
| Ecology | 2 |
| Electronics | 2 |
| Environment | 1 |
| Genetics | 1 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 2 |
| Telecommunications | 1 |