壁厚的增加防止了由于在紊流区中的侵蚀而引起的早期损坏。
The additional wall thickness prevents early failures due to erosion in the turbulent flow area.
球手应当确保任何他造成的打迹和球对球洞区造成的损坏，都应小心地修理好。
A player should ensure that any divot hole made by him and any damage to the putting green made by a ball is carefully repaired.
方法随机选择16例前牙和前磨牙区因瓷裂或瓷崩而导致失败的病例，记录修复体损坏的部位，分析产生失败的原因。
Methods 16 cases with fracture or exfoliation on the area of anterior teeth and premolar were selected, the damage's parts of prosthesis were recorded, and the causes of failure were analyzed.
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