放射 /fàngshè/ angolul

emission [emissions]▼(act of sending or throwing out)
noun
[UK: ɪ.ˈmɪʃ.n̩] [US: ˌɪ.ˈmɪʃ.n̩]

radiation [radiations]▼(shooting forth of anything from a point or surface)
noun
[UK: ˌreɪ.dɪ.ˈeɪʃ.n̩] [US: ˌre.di.ˈeɪʃ.n̩]

radioactivity [radioactivities]▼(radiation emitted)
noun
[UK: ˌreɪ.dɪəʊæk.ˈtɪ.vɪ.ti] [US: ˌreɪ.dɪo.ʊæk.ˈtɪ.vɪ.ti]