名词
中文翻译：第二层底部
同义词：
['second layer', 'bottom layer']
例句：
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1.The engineer inspected the second bottom of the ship to ensure it was structurally sound.
工程师检查了船只的第二层底部，以确保其结构稳固。
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2. The scientist conducted a study on the second bottom of the ocean to understand its biodiversity.
科学家对海洋的第二层进行了研究，以了解其生物多样性。
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3. The construction crew worked diligently to repair the second bottom of the bridge, ensuring safety for all passengers.
施工团队努力修复桥的第二层底部，确保所有乘客的安全。