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| посматрање | |||
| 英语 词库 | |||
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| The condition of weather and terrain that permits a force to see the friendly, enemy, and neutral personnel and systems, and key aspects of the environment. (FRA) | |||
| obbo; observ; obsv | |||
| obsn; obsr | |||
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Observation : 3 短语, 2 学科 |
| 数学 | 2 |
| 电子产品 | 1 |