Studios, in effect, control the movie ratings board and endlessly lobby it not to label extreme violence with an NC-17, the only form of rating that is actually enforced.

制片厂实际上控制了电影级别评定委员会，并且永无止境地对其进行游说，以便不把那些充满极度恐怖的影片评为NC - 17级，级别评定的唯一形式实际上是强制性的。

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To aim at the research on cutting direction in NC machining of free-form surfaces, a simplified time model for tool trace is established, and the system of tool path programming is discussed.

针对自由曲面走刀方向数控加工的研究，建立了简化的刀具轨迹时间模型，并对路径规划的系统进行了讨论。

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Moreover, the system could quickly, directly and accurately generate not only the detailed drawing of high precision form tools, but also the NC program.

借助该系统可直接快速、准确地生成高精度成形车刀工作图，以及成形车刀的数控加工程序。

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