multiple-cell
| echo
| multiple cell | |
| desert. | 复合环圈 |
| Echo | |
| space | 回声卫星 |
| echo | |
| gen. | 重复; 回响; 反射 |
| bridge. | 回声信号 |
| econ. | 反响; 响应 |
| hydroel.st. од. | 回声 |
| met. од. | 回波 |
| space | 回应 |
| |||
| 复合环圈 | |||
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multiple-cell : 12 phrases in 8 subjects |
| Biology | 1 |
| Bridge construction | 1 |
| Chemistry | 2 |
| Dermatology | 1 |
| Earth sciences | 1 |
| Metallurgy | 3 |
| Meteorology | 1 |
| Technology | 2 |