a green surface used as a background when making a film or television programme, so that any image can replace the screen behind the actors; the use of this method in filming

The video was filmed entirely in front of a green screen over the course of one day. 该视频完全是在绿屏前拍摄的，历时一天。

Actors now are used to working with green screen, and it's a big part of what we do. 演员们现在已经习惯了与绿屏合作，这也是我们工作的一个重要部分。