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| density index | |||
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密度指 数 : 23 phrases in 14 subjects |
| Agriculture | 1 |
| Animal husbandry | 1 |
| Business | 1 |
| Desert science | 1 |
| Earth sciences | 2 |
| Economy | 1 |
| Engineering geology | 1 |
| Forestry | 1 |
| Geophysics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 3 |
| Oil processing plants | 1 |
| Space | 2 |
| Technology | 6 |
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