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po 音标拼音: [p'o] n. 波河;室内便器;便壶 波河;室内便器;便壶 PO PO程式区 PO Po n 1: a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor [synonym: {polonium}, {Po}, {atomic number 84}] 2: a noncommissioned officer in the Navy or Coast Guard with a rank comparable to sergeant in the Army [synonym: {petty officer}, {PO}, {P.O.}] 3: a European river; flows into the Adriatic Sea [synonym: {Po}, {Po River}] 4: an independent agency of the federal government responsible for mail delivery (and sometimes telecommunications) between individuals and businesses in the United States [synonym: {United States Post Office}, {US Post Office}, {Post Office}, {PO}] |
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