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natural sound |
固 有声 : 18 phrases in 12 subjects |
Air defense | 1 |
Automobiles | 1 |
Communications | 1 |
Electronics | 1 |
Fishery fishing industry | 1 |
Geophysics | 1 |
Information technology | 1 |
Multimedia | 1 |
Otorhinolaryngology | 1 |
Rail transport | 1 |
Technology | 6 |
Telecommunications | 2 |