“francium”网络释义
一种化学元素,原子序数87,符号为Fr,属于碱金属,是非常不稳定且放射性的元素。
“francium”用法和例句
1. Francium is the second rarest naturally occurring element in the Earth's crust.
(法锂是地壳中第二稀有的自然存在的元素。)
2. Due to its high radioactivity, francium has very limited practical applications.
(由于它具有很高的放射性,法锂的实际应用非常有限。)