名词
中文翻译：子弹壳
同义词：
['bullet case', 'bullet shell', 'bullet casing']
例句：
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1. Thesoldier was wearing a bullet casing on his chest.
士兵的胸前戴着一个子弹壳。
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2. The police found the bullet casing in the crime scene.
警方在犯罪现场发现了子弹壳。
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3. The bullet casing had been carefully wrapped and stored for years.
这个子弹壳被小心地包裹并储存了多年。