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| 正常密度 | |||
| 正态密度; 标准密度 | |||
| normal density: 19 phrases in 11 subjects |
| Aviation | 1 |
| Bridge construction | 2 |
| Business | 3 |
| Economy | 1 |
| Information technology | 1 |
| Management | 1 |
| Mathematics | 1 |
| Metallurgy | 2 |
| Space | 2 |
| Technology | 4 |
| Telecommunications | 1 |
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