francium

常见例句

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。
The half-life of francium is 22 minutes
鈁的半衰期是22分鍾。