| |||
| 网络抽样 | |||
|
network sampling : 26 phrases in 12 subjects |
| Air defense | 1 |
| Aviation | 2 |
| Chemistry | 1 |
| Desert science | 2 |
| Earth sciences | 2 |
| Ecology | 2 |
| Electronics | 2 |
| General | 1 |
| Mathematics | 2 |
| Technology | 9 |
| Television | 1 |
| United States | 1 |
| |||
| 网络抽样 | |||
|
network sampling : 26 phrases in 12 subjects |
| Air defense | 1 |
| Aviation | 2 |
| Chemistry | 1 |
| Desert science | 2 |
| Earth sciences | 2 |
| Ecology | 2 |
| Electronics | 2 |
| General | 1 |
| Mathematics | 2 |
| Technology | 9 |
| Television | 1 |
| United States | 1 |