Material mark, sub surface.

内表面刻材料标记。

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The surfaces are made from a material that doesn't mark.

这些台面是由不会留下污渍的材料做的。

《牛津词典》

Mark Twain travel anywhere in all his life, his adventure aboard is the material of his works.

马克·吐温一生中到处旅游，他在国外的历险经历是他一些作品的素材。

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"This is not a material change in guidance, " says Morris Mark of Mark Asset Management, which also holds AOL Time Warner shares.

FORBES: Magazine Article

Mr. Mark said his firm sold a "material" amount of Apple stock last year, but lately has been holding or moderately increasing its position.

WSJ: Apple Defends Position on Cash

Instead, the team modified a substance known as Powder Suspension, a thick, tar-like material, and found that it produced a clear, high-quality mark on the smooth-surfaced food items such as onions, apples and tomatoes.

BBC: Fingerprint on food