类别：英语 / 日期：2025-11-26 / 浏览：0 / 评论：0
francium
英[ˈfrænsiəm] 美[ˈfrænsiəm]
francium
- 1 . The half - life of francium is 22 minutes.
- 钫的半衰期是22分钟.
来自辞典例句
- 2 . Francium is the densest of the Alkali Metals and also radioactive.
- 钫是碱金属中密度最大的,具有放射性.
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