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| ümbrik (Header and footer information, or header information only, which encapsulates or precedes document data for transport) | |||
| 英语 词库 | |||
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| env | |||
| The outer coat of HIV, made up of two layers of lipids fatty molecules. HIV uses specific proteins embedded in its envelope to enter host cells. | |||
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envelope : 13 短语, 6 学科 |
| 建造 | 1 |
| 微软 | 4 |
| 数学 | 2 |
| 财政 | 1 |
| 运输 | 3 |
| 通讯 | 2 |