名词
中文翻译：Unknown
同义词：
['membrane bag', 'membrane pouch', 'membrane envelope']
例句：
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1. The researchers used a membrane envelope to protect the sample during transport.
研究人员使用膜囊来保护样品在运输过程中不受损害。
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2. The membranous structures in the plant are essential for photosynthesis.
植物中的膜状结构对于光合作用至关重要。
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3. The membrane envelope is designed to prevent contamination of the sample during storage.
膜囊的设计目的是在储存期间防止样品受到污染。