 |
| |||
| 背景噪声; 声底数值 | |||
| 噪声背景 | |||
| 噪声本底; 本底噪声 | |||
| noise background: 52 phrases in 17 subjects |
| Air defense | 3 |
| Architecture | 1 |
| Automobiles | 3 |
| Aviation | 1 |
| Communications | 1 |
| Electronics | 3 |
| Engineering geology | 1 |
| Environment | 1 |
| Fishery fishing industry | 1 |
| Geophysics | 1 |
| Information technology | 1 |
| Metallurgy | 1 |
| Nautical | 1 |
| Project management | 2 |
| Remote sensing | 1 |
| Space | 5 |
| Technology | 25 |