Harry's gaze wandered to the portrait that sometimes contained Phineas Nigellus Black, Sirius's great-great grandfather, but it was empty, showing nothing but a stretch of muddy backdrop.

哈利目光徘徊在菲尼亚斯? 奈杰勒斯肖像框上--他是小天狼星祖父。但是现在像框里什么都没有，只有个泥泞背幕。

For example, theater scenery used to consist of large painted backdrops raised and lowered by stagehands who would whistle to signal each other.

比如，过去剧院由大型彩绘背幕组成，由舞台工作人员升降，他们会用吹口哨方式互相传递信号。

Through the windows you might be able to see we have a new printed backdrop which is called a translight.

透过窗户你能看到新印刷背，叫透光幕。

At the back of the stage in most theatres there's a " backdrop, " a large curtain.

在大多数剧院舞台后方，有个“背幕”，即块大幕。