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francium

F 开头单词

基本解释

  • n.[化]鈁

同根派生

     

英汉例句

  • The half-life of francium is 22 minutes.
    鈁的半衰期是22分鍾。
  • Francium is the densest of the Alkali Metals and also radioactive.
    鈁是堿金屬中密度最大的,具有放射性。
  • So little is known about it, because there is only about 1 ATOM OF FRANCIUM IN A CUBIC FOOT OF URANIUM ORE!
    對它所知甚少,因爲在1立方英尺的鈾鑛石中,僅有1個鈁原子!
  • Even Francium's most stable isotope, Francium-223 only has a half-life of 22 minutes.
    鈁的最穩定的同位素,鈁-223也衹有22分鍾的半衰期。
  • Because Francium is mainly only found synthetically in laboratory research, it has no known use outside of the laboratory.
    由於鈁主要僅在實騐室研究中産生,它在實騐室外沒有已知的用途。