名词
中文翻译：外壁的
同义词：
['exoskeletal', 'extracellular', 'extracellular matrix']
例句：
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1.The exoskeleton of the crab is made up of calcium carbonate.
螃蟹的外骨骼由碳酸钙组成。
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2.The extracellular matrix is crucial for tissue growth and repair.
细胞外基质对组织生长和修复至关重要。
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3. The extracellular matrix is also known as the ground substance.
细胞外基质也被称为基底物质。