名词短语
中文翻译：头和壳的开口
同义词：
['head and mouth opening', 'head and body opening']
例句：
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1. Thescientist found a new way to open the head and shell of the oyster.
科学家发现了一种打开牡蛎头和壳的新方法。
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2. The crab's head and shell are very hard to open.
螃蟹的头和壳很难打开。
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3. The scientists discovered that the head and shell of the turtle were made of a special material.
科学家们发现乌龟的头和壳是由一种特殊的材料制成的。