单词	positronium
释义	positronium noun pos·​i·​tro·​ni·​um ˌpä-zə-ˈtrō-nē-əm  : a short-lived system that consists of a positron and an electron bound together and is suggestive of a hydrogen atom Example Sentences Recent Examples on the Web For example, in the 1990s physicists thought, essentially, that positronium didn’t live as long as predicted. Adrian Cho, Science | AAAS, 25 Aug. 2020 That makes positronium an ideal tool with which to look for new physics, Cassidy says. Adrian Cho, Science | AAAS, 25 Aug. 2020 Word History First Known Use 1945, in the meaning defined above
随便看	acetaldols acetalize acetals acetamide acetamides acetamidine acetamido- debunked debunker debunkers debunking debunks deburr deburred deburring deburrs deburse debus debussed debusses debussing Debussy debussyan debut debutanization

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