名词
中文翻译：外壳
同义词：
['shell', 'cover', 'cap']
例句：
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1.The engineer carefully removed the casing top half to access the inner components.
工程师小心翼翼地移除了顶盖以便于检查内部组件。
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2. The new product has a sleek casing top half that is easy to grip.
新产品的外壳顶盖设计光滑，易于握持。
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3. The company's latest innovation involves a casing top half that is more durable and energy-efficient.
该公司的最新创新包括一个更耐用且节能的外壳顶盖。