名词
中文翻译：外皮
同义词：
['exoskeleton', "cuticle例句：1. The beetle's hard shell protects its softer inner parts.（甲虫的坚硬外壳保护着它的柔软内部。）"]
例句：
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1. The beetle's hard shell protects its softer inner parts.
甲虫的坚硬外壳保护着它的柔软内部。
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2. The tree's outer bark is a natural defense against insect attacks.
树的外皮是天然的抵御昆虫攻击的防御。
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3.The scientist removed the outer layer of the sample to analyze its chemical composition.
科学家移除了样本的外层以分析其化学成分。