研究了数控铣削加工过程中刀具轨迹的生成，以及不同轨迹形式对加工质量有何影响等内容。
This paper study the making of cutting tool locus in CNC milling, and study the influence of deferent cutting tool locus on cutting quality.
在你们人类形式，失去你正在做什么的轨迹是如此的容易。
In your human form it is so easy to lose track of what you are doing.
事实上，轨迹，简称为压缩痕迹，其本质上是云。他们跟大气层上自然形式的云没什么不同。
Actually, contrails, short for condensation trails, are essentially clouds. They are no different from the cirrus clouds that naturally form in that region of the atmosphere.
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