Radiotherapy cov lus txhais raw khoom
Tom qab cov Neeg Ntseeg tau tshawb pom radium, vim hais tias radium muaj qhov tshwj xeeb rau kev kho mob cancer, qhov kev thov rau radium nce ntxiv, yog li ntau lub tebchaws pib rho radium los ntawm bituminous uranium ore, thiab uranium-muaj slag muab rho tawm los ntawm radium tau piled ib sab. "Khib." Txawm li cas los xij, tom qab pom ntawm uranium nuclear fission, uranium los ua ib qho tseem ceeb tshaj plaws. Cov "khib nyiab no" tau dhau los ua "menyuam yaus." Txij thaum ntawd los, uranium mining kev lag luam tau tsim tau zoo heev thiab tau tsim ib qho kev ywj pheej thiab ua tiav atomic energy qhov system.