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共价键
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共价键covalent bond 【化】 covalent bond covalent link(age)共价键gòngjiàjiàn[covalent bond] 一种非离子键,是由两个原子共享一对电子而形成的,这一对电子或者原来属于一个原子,或者原来分属于两个原子
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exposure labeling
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exposure-meter
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expound the law
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express abrogation
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expressage
express agreement
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express as
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更新时间:2026/10/23 17:10:04