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| 野外观察 | |||
| 现场观察 | |||
| 地形观测; 现场观测; 原型观测; 田间观察; 实地观察; 地形摄影 | |||
| 野外观测 | |||
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field observation : 15 phrases in 6 subjects |
| Agriculture | 1 |
| Desert science | 1 |
| Earth sciences | 1 |
| General | 2 |
| Metallurgy | 3 |
| Technology | 7 |
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