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| sheath | |||
| envelope (A structured set of information that wraps and accompanies an instance message, often describing delivery and processing information. Envelopes can be nested) | |||
| correspondence envelope; correspondence pocket | |||
| envelope | |||
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| envelopes stationery | |||
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envelope : 61 短语, 19 学科 |
| 一般 | 2 |
| 专利 | 3 |
| 信息技术 | 4 |
| 农业 | 1 |
| 劳动法 | 2 |
| 医疗的 | 3 |
| 卫生保健 | 2 |
| 国际货币基金组织 | 2 |
| 微软 | 7 |
| 技术 | 4 |
| 数学 | 3 |
| 机械工程 | 1 |
| 爱好和消遣 | 1 |
| 生命科学 | 1 |
| 电子产品 | 2 |
| 经济 | 1 |
| 统计数据 | 3 |
| 运输 | 6 |
| 通讯 | 13 |