 |
| |||
| 联合国人类环境会议 | |||
| United Nations Human Environment Conference: 7 phrases in 5 subjects |
| Animal husbandry | 1 |
| Ecology | 1 |
| Environment | 2 |
| Technology | 1 |
| United Nations | 2 |
|
| |||
| 联合国人类环境会议 | |||
| United Nations Human Environment Conference: 7 phrases in 5 subjects |
| Animal husbandry | 1 |
| Ecology | 1 |
| Environment | 2 |
| Technology | 1 |
| United Nations | 2 |