 |
| |||
| 概念开发 | |||
| ★ 概念发展 | |||
|
concept development : 13 phrases in 7 subjects |
| Aviation | 5 |
| China | 3 |
| Ecology | 1 |
| Hydroelectric power stations | 1 |
| Insurance | 1 |
| Nautical | 1 |
| Space | 1 |
|
| |||
| 概念开发 | |||
| ★ 概念发展 | |||
|
concept development : 13 phrases in 7 subjects |
| Aviation | 5 |
| China | 3 |
| Ecology | 1 |
| Hydroelectric power stations | 1 |
| Insurance | 1 |
| Nautical | 1 |
| Space | 1 |