['reidjəm]
radium
n. 镭

词形变化:

简写符号:Ra

例句与用法:

  1. Tell me when radium was found.
    告诉我镭是什么时候被发现的。
  2. Radium and uranium are radioactive elements.
    镭和铀是放射性元素.

英英解释:

名词 radium:

  1. an intensely radioactive metallic element that occurs in minute amounts in uranium ores
  2. 同义词:Ra, atomic number 88