单词	muonium
释义	muonium noun mu·​on·​ium myü-ˈō-nē-əm  -ˈä-  : a short-lived quasi-atom consisting of an electron and a positive muon Word History Etymology New Latin First Known Use 1957, in the meaning defined above
随便看	on a tear on a tight budget on a trial basis on a whim on a wing and a prayer on a/the downswing on a/the knife-edge on about on account on account of on aggregate on air on all counts on all cylinders on all hands on all/several counts on an empty stomach on an equal footing on an even keel on and off on and on on another line on appeal on approval on at

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