1. The machinability of crystal material is studied, and the influence of the cutting condition on surface roughness is analyzed. 本文探讨了晶体材料的切削加工性，重点分析了切削条件对表面粗糙度的影响。
2. The results show that by using self-made polishing agent, the polished products have low surface roughness and good brightness after spiral vibration polishing process. 结果表明，利用螺旋振动抛光工艺，配合自制的抛光液，抛光后制品的表面具有较低的粗糙度和较好的光亮性。
3. Pavement roughness, as an important indicator of the road evaluation and acceptance, directly reflects the running of the vehicles′ comfort, road safety and road use period. 路面平整度是路面评价和施工验收的重要指标，直接反映了车辆行驶的舒适度、路面安全性和使用期限。
英英解释
n.
1. a texture of a surface or edge that is not smooth but is irregular and uneven
2. the quality of being unpleasant (harsh or rough or grating) to the senses
3. an unpolished unrefined quality
4. used of the sea during inclement or stormy weather
5. rowdy behavior
6. the formation of small pits in a surface as a consequence of corrosion
7. harsh or severe speech or behavior
