Do not use drop shadows, gradients, or three-dimensional images.

不要使用阴影、渐变或三维图像。

youdao

Avoid large drop shadows; the UI might add shadows. It's OK to use small shadows for contrast.

不必设计明显的阴影；UI会自动添加。小阴影即可形成对比。

youdao

Visual cues and drop shadows improve visibility when adjusting the layout of shortcuts and widgets.

在调整快捷方式和widget的布局时，视觉线索和阴影的使用改善了可视效果。

youdao

Since Enlightenment is a Compositing Window Manager, you get those fancy drop shadows and window transparencies.

ENGADGET: How-to: Picking a Window Manager in Linux