/ˌsaɪ.məlˈteɪ.ni.əs.li/
The game will be broadcast simultaneously on TV and radio.
Two children answered the teacher’s question simultaneously.
The network was broadcasting four games simultaneously across the country.
adjective simultaneous
happening or done at the same time as sth else 同时发生（或进行）的；同步的
There were several simultaneous attacks by the rebels.
反叛者同时发动了几起攻击。
simultaneous translation/interpreting
同声传译