an opportunity to see something such as a film or a collection of works of art before it is shown to the public, or a description of something such as a television programme before it is shown to the public

short parts of a television show or film that are shown to the public in order to advertise it

to describe something or be shown before it officially begins

Miller's new play is previewing (= being performed publicly before it officially opens) at the Theatre Royal tomorrow. 米勒的新剧将于明天在皇家剧院预演。

On page 11, Sally Gaines previews next week's movies on TV. 在第11页，萨莉•盖恩斯介绍了下周将在电视上播出的电影。