背景幕

• backdrop
• backcloth
• back cloth
• back drop

例句

1. 幕布在剧院或大厅内隔开舞台和观众或作为背景幕的可移动遮蔽物或帷幕
   The movable screen or drape in a theater or hall that separates the stage from the auditorium or that serves as a backdrop.