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ir    
n. 红外

红外

Ir
n 1: a heavy brittle metallic element of the platinum group;
used in alloys; occurs in natural alloys with platinum or
osmium [synonym: {iridium}, {Ir}, {atomic number 77}]
2: a board of the British government that administers and
collects major direct taxes [synonym: {Inland Revenue}, {IR}]

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