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单词
positronium
释义
pos·i·tro·ni·um
(p
ŏ
z
′
ĭ
-tr
ō
n
ē
-
ə
m)
n.
A short-lived association of an electron and a positron bound together in a configuration resembling the hydrogen atom.
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更新时间:2026/3/30 2:29:47