foreground & background 前台和后台程序
foreground-background programs 前台后台程序
foreground-background discipline 前后台规则
foreground-background contrast 以及前景
foreground-background communication 前后台通信
foreground-background environment 前后台环境
foreground-background scheduling 前台 ; 前后台调度
foreground-background job 前后台作业
foreground-background mode 前后台工作方式
For example, a film-maker might opt to include the background sound of an ambulance's siren while the foreground sound and image portrays an arguing couple.
例如，电影制作人可能会选择在背景中加入救护车的警笛声，而在前景的声音和图像中表现一对争吵的夫妇。
Photo tip: Add layers to your composition-that is, multiple elements beyond the main subject, such as foreground and background elements.
拍照小技巧：给你的构图分层——也就是说，给拍摄主体添上多种元素，例如前景和背景元素等。
By blurring objects in the foreground, background or by blurring the entire design, you can dramatically increase the impact of your project.
通过模糊前景、模糊背景，甚至整个设计，你可以动态地增加你的项目的冲击力。
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