francium
美 ['frænsi?m]
英 ['frænsi?m] 
英漢雙解
1. | 鈁(放射性化學元素)a chemical element. Francium is a radioactive metal. |
英漢解釋
英英解釋
例句
The cesium-radon period also includes the lanthanides, and the period beginning with francium includes the actinides.
銫一氡周期還包括鑭系元素,以鈁開始的周期包括錒系元素。
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也只有22分鐘的半衰期。