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单词
heptad
释义
hep
·
tad
/ˈheptæd/
n.
1.
七
2.
成七的一组
(或一套)
3.
【
化
】
七价物;七价原子;七价基;七价元素
[<Gr heptas, heptados
(group of)
seven < hepta seven]
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更新时间:2025/8/12 19:51:58