名词
中文翻译：初级价键
同义词：
['primary bond', 'primary covalent bond', 'primary valence bond']
例句：
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1. The primaryvalence bond in the compound is responsible for its reactivity.
化合物中的初级价键负责其反应性。
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2. The primary valence bond between carbon and hydrogen is what makes carbon compounds reactive.
碳和氢之间的初级价键是使碳化合物具有反应性的原因。
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3. In a chemical reaction, the primary valence bond is broken and new bonds are formed.
在化学反应中，初级价键被打破，形成新的键。