ruthenium
ruthenium[rʊˈθiːnɪəm]noun- [mass noun]the chemical element of atomic number 44, a hard silvery-white metal of the transition series(Symbol: Ru)
(化学元素)钌(符号:Ru)
语源- mid 19th cent.: modern Latin, from medieval Latin Ruthenia (see Ruthenia), so named because it was discovered in ores from the Urals
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