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positron

noun
🔊/ˈpɒzɪtrɒn/
🔊/ˈpɑːzɪtrɑːn/
(physics物理)
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  1. a particle in an atom which has the same mass as an electron and an equal but positive charge正电子；阳电子
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    Word Origin1930s: from positive + -tron.