The material surface coarse, coating can't cover serious level.

素材表面严重粗糙，镀层无法覆盖平整。

youdao

Rinse with water so landscape stone should be avoided or washed stone material surface with a wet mop.

因此景观石应避免用水冲洗或以过湿拖把洗石材表面。

youdao

Radial imperfection. A radial imperfection may be defined as any imperfection whose vertical axis is perpendicular to the material surface.

径向缺欠。径向缺欠可定义为其纵轴垂直于材料表面的任何缺欠。

youdao

Scientists said the glass came from material created as deep as three hundred kilometers below the moon's surface.

VOA: special.2009.07.29

Observations of the material coating the dark face of Iapetus indicate it has a similar composition to the surface material on Phoebe.

BBC: New ring detected around Saturn

Scientists cannot tell yet how easy it will be to scoop up the surface material, she said.

CNN: Mars landing went 'flawlessly,' scientists say

Areas that in 2005 had looked like flows of material on the surface appeared on this occasion to have undergone some erosion.

BBC: Stardust probe finds 'subdued' comet crater