It is a hard and brittle material.

这是一种硬而脆的材料。

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Therefore, the roll surface is extremely hard and brittle and it is thermally unstable.

因此，辊子表面有极高的硬度、脆性及热不稳定性。

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Hard and Brittle Materials are widely used in many industries because of their unique properties.

非金属硬脆材料具有独特的性质，使其在诸多行业的应用日益广泛。

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They are all bound, hard and brittle.

电子都成键，牢固而硬脆。

麻省理工公开课 - 固态化学导论课程节选

"A lot of security systems are hard and brittle, " says Robert Baldwin, head of the security firm Plus Five Consulting.

FORBES: Hang the Pirates

Babs was what Diana, God help us, might be thirty years hence high-heeled, ceramicized, liposucted, devaricosed, her golden fall of hair as shiny and hard as peanut brittle.

NEWYORKER: Wakefield

However, the early goal was a huge blow to what is clearly still a side with brittle confidence and whilst they battled hard they never recovered from falling behind.

BBC: Sunderland 4-0 Bolton