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AU 音標拼音: ['o] 接入單元 接入單元 Au n 1: a soft yellow malleable ductile (trivalent and univalent) metallic element; occurs mainly as nuggets in rocks and alluvial deposits; does not react with most chemicals but is attacked by chlorine and aqua regia [synonym: {gold}, {Au}, {atomic number 79}] 2: a unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers) [synonym: {Astronomical Unit}, {AU}] |
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