The radar, called the Mini-SAR, sends pulses of left-polarized radio waves out to measure the surface roughness of the moon.

那个叫做Mini-SAR的雷达，通过向月表发射左旋极化电磁脉冲来测定月球的表面粗糙度。

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The portable surface roughness tester carries out accurate measurement of product surface roughness at workshop or calibration department.

便携式表面粗糙度测量仪成功地实现了在生产车间和计量部门对工件的表面粗糙度的精确测量。

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The theory of rough-set points out that knowledge has granularity and defines the concept of roughness of knowledge.

在粗糙集理论中，提出知识是有粒度的并定义了知识粗糙度的概念。

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Any player guilty of starting a fight or of excessive roughness is thrown out of the game.

BBC: Ice hockey