francium

英汉释义

• n.

  1.【化】[钫]

英英释义

• n.

  1.an unstable radioactive element of the alkali-metal group.

英汉例句

• 1.The cesium-radon period also includes the lanthanides, and the period beginning with francium includes the actinides.

  铯一氡周期还包括镧系元素，以钫开始的周期包括锕系元素。

• 2.Even Francium's most stable isotope, Francium-223 only has a half-life of 22 minutes.

  钫的最稳定的同位素，钫-223也只有22分钟的半衰期。