 |
| |||
| 平均体积 | |||
| average volume: 26 phrases in 13 subjects |
| Architecture | 1 |
| Automobiles | 3 |
| Bridge construction | 1 |
| Finances | 2 |
| International trade | 1 |
| Metallurgy | 1 |
| Nuclear and fusion power | 1 |
| Oil / petroleum | 1 |
| Polymers | 1 |
| Securities | 3 |
| Space | 1 |
| Technology | 9 |
| Water resources | 1 |