对于平面曲线,当然还有些有趣的问题,比如可以研究各种机械配件。
With plane curves, certainly there's interesting things with all sorts of mechanical gadgets that we can study.
频数曲线提供脆的食物一个机械签字。
The frequency curve provides a mechanical signature of the crisp food.
并且这些曲线在机械加工上是可行的。
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