| |||
标准频率; 简正频率 | |||
正态频率; 正常频率 |
normal frequency: 27 phrases in 13 subjects |
Agriculture | 2 |
Aviation | 1 |
Business | 2 |
Electronics | 1 |
Hydrology | 1 |
International trade | 1 |
Mathematics | 3 |
Metallurgy | 1 |
Oil / petroleum | 3 |
Selective breeding | 1 |
Space | 1 |
Statistics | 1 |
Technology | 9 |