Place it as the final beat of an edit, after the last scene has settled. Let a mission-passed cue mark the win first, then follow with this closing line, and keep a victory sting just before it if the night ended on a high.
關於此聲音
This is a short spoken line, about two and a half seconds long, in which a voice says that everyone is done for the night. It feels final and a little weary, like the last word before lights out, with a quiet sense that the day has run its course.