protective envelope
英
美
- 保护层[套；膜；外壳]
双语例句
- In some viruses the nucleocapsid is surrounded by an envelope.
某些病毒的核衣壳是由被膜所包绕。 - Freda security film is the latest high-tech protective equipment.
福瑞达安全膜是最新高科技防护装备。
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