单词	positron
释义	positronpos‧i‧tron /ˈpɒzətrɒn $ ˈpɑːzətrɑːn/ noun [countable] technical Word Origin WORD ORIGINpositron Origin: 1900-2000 positive + -tron (as in electron) Examples EXAMPLES FROM THE CORPUS The Dark Era begins when space is dominated by tiny particles such as photons, electrons and positrons. When an electron collides with a positron the two particles disappear, or annihilate, to create a high-energy photon. a very small piece of matter that has the same mass as an electron but has a positive electrical charge
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