francium

常見(jiàn)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(duì)它所知甚少,因爲(wèi)在1立方英尺的鈾鑛石中,僅有1個(gè)鈁原子!
Even Francium's most stable isotope, Francium-223 only has a half-life of 22 minutes.
鈁的最穩(wěn)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(shí)騐室研究中産生,它在實(shí)騐室外沒(méi)有已知的用途。
The half-life of francium is 22 minutes
鈁的半衰期是22分鍾。