名词
中文翻译：Unknown
同义词：
['connective tissue', 'covalent bond']
例句：
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1. The underbond in the bone connects to the muscle fibers.
骨骼中的连接组织将肌肉纤维连接在一起。
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2. The chemical compound has a strong covalent bond between its atoms.
这种化合物在其原子之间有强烈的共价键。
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3. The economic relationship between the two countries is based on underbonds.
两国之间的经济关系基于共价键。