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单词
lepton era
释义
lepton era
lepton era
[
′lep‚tän ‚ir·ə
]
(astronomy)
The period in the early universe, following the hadron era, during which electrons, positrons, neutrinos, and photons were present in nearly equal numbers; roughly between 10
-4
and 20 seconds after the big bang.
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更新时间:2025/3/31 5:35:56