999英语网 英语单词
Astatine的音标发音
Astatine
英式发音：[stti:n]
美式发音
(noun.) a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium.
克莱儿整理
(noun.) a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium.
克莱儿整理