 |
| |||
| 很多机会 | |||
| 露地; 大田; 旷野 | |||
| 空旷地带; 无人防守区; 无人防守地区 | |||
| 开放区 | |||
| open field: 30 phrases in 13 subjects |
| Advertising | 1 |
| Agriculture | 7 |
| Animal husbandry | 2 |
| Architecture | 2 |
| Automobiles | 1 |
| Ecology | 1 |
| Economy | 3 |
| Electric machinery | 1 |
| Explosives and Explosive Ordnance Disposal | 3 |
| Life sciences | 1 |
| Metallurgy | 4 |
| Sports | 1 |
| Technology | 3 |