 |
| |||
| hierarchical model | |||
| 分级模 型: 10 phrases in 5 subjects |
| Earth sciences | 1 |
| Information technology | 1 |
| Name of organization | 1 |
| Space | 3 |
| Technology | 4 |
|
| |||
| hierarchical model | |||
| 分级模 型: 10 phrases in 5 subjects |
| Earth sciences | 1 |
| Information technology | 1 |
| Name of organization | 1 |
| Space | 3 |
| Technology | 4 |