旁白的英文是甚麼?

narrator.

旁白的英文是.(in the theatre) an aside; a voice-over
.to speak aside

an aside,a voice-over

narrator

Formally, it's called narration. The person who does the narration is then a narrator.

depends on the usage of the word.
story telling: narrative
commercial: voice over

1.(in the theatre) an aside; a voice-over
2.to speak aside

1.(in the theatre) an aside; a voice-over
2.to speak aside