Cinemad is a commercial played before a movie.電影映前廣告就是在電影上映前播放的商業廣告。These days moviegoers get previews of coming attractions, which is actually cinemad, but entertaining enough to get a pass.目前去影院看電影的人在電影播放前都會看到幾段馬上上映的電影的預告片，這其實是電影映前廣告，但由于夠精彩，所以也就被默許了。