Big brother and big sister are coming in!

Three years and nine months shows that Madame Curie has been refining radium for a long time, and at the same time, it can also reflect Madame Curie's persistent spirit and constant pursuit of scientific undertakings.

The world can finally appreciate Madame Curie's hardships and great contribution to human society.

It may indicate that this ton of industrial waste residue may not contain radium. Without radium, Madame Curie's work would be in vain, which made us realize Madame Curie's pursuit of science.

I called it myself. My neighbor's children made it the other day. . .