stron·tium /ˈstrɑn(t)ʃ(i)əm, ˈstrɑntiəm/
  鍶[金屬元素]
  stron·tium /ˈstrɑnʧ(ɪ)əm, ˈstrɑntɪəm/ 名詞
  Stron·ti·um n.  Chem. A metallic element of the calcium group, always naturally occurring combined, as in the minerals strontianite, celestite, etc. It is isolated as a yellowish metal, somewhat malleable but harder than calcium. It is chiefly employed (as in the nitrate) to color pyrotechnic flames red. Symbol Sr. Atomic weight 87.3.
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  strontium
       n : a soft silver-white or yellowish metallic element of the
           alkali metal group; turns yellow in air; occurs in
           celestite and strontianite [syn: Sr, atomic number 38]
  strontium
  Symbol: Sr
  Atomic number: 38
  Atomic weight: 87.62
  Soft yellowish metallic element, belongs to group 2 of the periodic
  table. Highly reactive chemically. Sr-90 is present in radioactive fallout
  and has a half-life of 28 years. Discovered in 1798 by Klaproth and Hope,
  isolated in 1808 by Humphry Davy.