名词
中文翻译：贝壳
同义词：
['shell', 'oyster shell', 'clam shell']
例句：
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1.The oysters are harvested from the shells.
牡蛎是从贝壳中收获的。
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2. The clam shell is a popular souvenir for tourists.
蛤蜊壳是游客们喜欢的纪念品。
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3.The shellback of the ship was damaged in the storm.
船的外壳在暴风雨中受损了。