声 反射 : 131 phrases in 19 subjects |
Air defense | 1 |
Automobiles | 5 |
Aviation | 3 |
Business | 2 |
Earth sciences | 1 |
Electronics | 6 |
Fishery fishing industry | 1 |
General | 1 |
Geophysics | 5 |
Hydroelectric power stations | 1 |
Metallurgy | 4 |
Nautical | 2 |
Nursing | 1 |
Oil / petroleum | 7 |
Otorhinolaryngology | 10 |
Refrigeration | 1 |
Space | 12 |
Technology | 66 |
Telecommunications | 2 |