radium
/reɪdɪəm/
n. 镭
[化] 镭Ra
英文释义
n. an intensely radioactive metallic element that occurs in minute amounts in uranium ores
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radium
/reɪdɪəm/
n. 镭
[化] 镭Ra
英文释义
n. an intensely radioactive metallic element that occurs in minute amounts in uranium ores
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