她测量了这两个元素放射性的总量和原子性质，感觉到物质的放射性是同放射性元素的总量成比例的。

She named the other radium. She measured the amount of radioactivity, an atomic property, and felt that the radioactivity was proportional to the amount of the element.

youdao

她测量了这两个元素放射性的总量和原子性质，感觉到物质的放射性是同放射性元素的总量成比例的。

She named the other radium. She measured the amount of radioactivity, an atomic property, and felt that the radioactivity was proportional to the amount of the element.

youdao