同义词： Pd atomic number 46
以上来源于: WordNet
N a ductile malleable silvery-white element of the platinum metal group occurring principally in nickel-bearing ores: used as a hydrogenation catalyst and, alloyed with gold, in jewellery. Symbol: Pd; atomic no: 46; atomic wt: 106.42; valency: 2, 3, or 4; relative density: 1202; melting pt: 1555°C; boiling pt: 2964°C 钯
N
N something believed to ensure protection; safeguard 据信能确保防卫的物; 防护措施
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