chatter mark

• 指在机械加工或工具使用过程中，因振动或不均匀加工而在表面（尤指金属或木材）留下的波浪状或不规则的痕迹，也指切削加工中产生的颤振纹。

A wavy or irregular mark left on a surface, especially on metal or wood, caused by vibration or uneven cutting during machining or tooling processes.

1. Geological featureC2formal

   A small, irregular groove or scratch on a rock surface caused by the movement of a glacier or by the vibration of a tool.

   冰川擦痕

   • The geologist identified chatter marks on the bedrock left by the retreating glacier.
   • Chatter marks can indicate the direction of glacial movement.
   • The surface of the stone was covered in fine chatter marks from the cutting tool.

2. Machining defectC2formal

   A wavy or uneven mark left on a machined surface due to vibration or chatter of the cutting tool.

   加工振纹

   • The lathe operator noticed chatter marks on the finished metal part.
   • Chatter marks can be reduced by adjusting the speed of the machine.
   • The surface finish was ruined by deep chatter marks.