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词汇	double bond
释义	double bondn.（名词）double bonddouble bond between oxygen atoms A covalent bond in which two electron pairs are shared between two atoms.双键：两个原子之间的两个电子对的共价键
随便看	undeliverable undemonstrative undeniable undependable under under under- underachieve underact underage underages underarm underbelly underbid underbite underbody underboss underbought underbred underbreds underbrush underbuy undercapitalize undercard undercarriage

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