本底辐射 Traditional 本底輻射 běn dǐ fú shè 🔊 background radiation + Keep this word Meanings běn dǐ fú shè 本底輻射 background radiation Its characters 本běn(measure word for books)HSK 1底dǐbottom; baseHSK 4辐fúspoke of a wheel射shèto shootHSK 6