They seem to be wide lines drawn with some white material.

这看似是由白色材料绘制而成的宽线。

youdao

That's an abstraction, though, and "White Material" is anything but abstract.

然而那很抽象，可《白色物质》绝非抽象。

youdao

Ivory is the hard white material that forms an elephant's two long teeth, or tusks.

象牙是一种很难找的白色材料，它们来自象的两个长牙。

youdao

Candy stood above Marjorie and trained her flashlight onto the pearly white material.

NEWYORKER: The Visitor

Then she tries sandals made with white khaki material.

CNN: ASIANOW - TIME Asia

Using white Italian marble, a material associated with the Western idealisation of the perfect human form, the works are both celebratory and subversive.

BBC: NEWS | Programmes | Newsnight | Newsnight Review | Marc Quinn