radium

n. /ˈreɪdiəm/ B2

镭

A radioactive metallic chemical element that glows in the dark.

仙境例句

In the palace treasure room, a tiny jar marked radium shone softly, and nobody knew what it was.

在王宫的藏宝室里，一个标着“镭”的小罐子发着淡淡的光，谁也不知道那是什么。