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| Oper f (One of the music genres that appears under Genre classification in Windows Media Player library. Based on ID3 standard tagging format for MP3 audio files. Winamp genre ID 103) | |||
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| Oper f | |||
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| Opern f | |||
| 英语 词库 | |||
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| operational analysis | |||
| out-of-pile expulsion and reentry apparatus | |||
| operational analysis | |||
| oil pollution environmental risk assessment | |||
| Open Process Engine For Reliable Activities | |||
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| A powerful type of drama, where a majority of the words are solely sung. | |||
| o | |||
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Opera : 50 短语, 11 学科 |
| 一般 | 30 |
| 光学（物理学分支） | 2 |
| 医疗的 | 2 |
| 建造 | 2 |
| 教育 | 1 |
| 文化学习 | 4 |
| 社会科学 | 1 |
| 艺术 | 2 |
| 英国（用法，不是 BrE） | 1 |
| 行业 | 3 |
| 非正式的 | 2 |