The movie displayed a perfect fusion of image and sound.
这部电影展示了音响与影像的完美结合。
《牛津词典》
2
For example, a film-maker might opt to include the background sound of an ambulance's siren while the foreground sound and image portrays an arguing couple.
例如，电影制作人可能会选择在背景中加入救护车的警笛声，而在前景的声音和图像中表现一对争吵的夫妇。
3
A meaningful sound track is often as complicated as the image on the screen, and is ultimately just as much the responsibility of the director.