| 词汇 | obs |
| 释义 | obs Ⅰ noun 1 observation. Probably military origin UK, 1999. 2 in a hospital, obstetrics UK, 1985 Ⅱ ⇨ obbo; obo; obbs; obs noun surveillance, observation; a lookout. Varying abbreviations for 'observation' UK, 1933 |
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