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| catacoustic; echoic | |||
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| echoic | |||
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回 声 的 : 24 phrases in 12 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Drilling | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 8 |
| Household appliances | 1 |
| Nautical | 1 |
| Navigation | 1 |
| Refrigeration | 2 |
| Space | 1 |
| Technology | 4 |
| Telecommunications | 1 |
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