名词
中文翻译：核心覆盖物
同义词：
['core layer', 'core material']
例句：
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1.The engineer designed a core cover for the tunnel to prevent water infiltration.
工程师设计了隧道的核心覆盖物以防止水分渗透。
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2.The company's core materials are made from high-quality steel plates.
该公司的核心材料是由高质量的钢板制成的。
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3. The core cover is essential for maintaining the integrity of the structure.
核心覆盖物对于保持结构完整性至关重要。