名词
中文翻译：外层膜
同义词：
['outer layer', 'external layer']
例句：
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1.The outer layer of the skin is responsible for protecting the body from harmful substances.
皮肤的外层负责保护身体免受有害物质的伤害。
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2.The outer layer of the plant is made up of cells that are specialized for photosynthesis.
植物的外层由专门进行光合作用的细胞组成。
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3.The outer layer of the skin is sensitive to temperature changes and can cause itching or rashes.
皮肤的外层对温度变化敏感，可能导致瘙痒或皮疹。