Ruthenium

[ru:'θi:niәm]

解释:

(noun.) a rare polyvalent metallic element of the platinum group; it is found associated with platinum.

阿黛尔编辑--From WordNet

解释:

(n.) A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Symbol Ru. Atomic weight 103.5. Specific gravity 12.26. See Platinum metals, under Platinum.

校对:罗杰

解释:

n. a hard brittle metal discovered in 1843 by Claus in the ore of platinum forming no fewer than four different oxides.

整理:梅尔巴