The Time Period of the Greek philosopher Democritus, who came up with the concept of 'atoms.' atoms struck the body and were translated into perception in the mind.

希腊哲学家德谟克里特时期，继承了“原子”的概念。原子敲击身体并传递给心灵产生知觉。

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The concept of cutting tool life-cycle management was put forward, and divided it into four phases: planning period, input time, serviceable life and discarding period.

提出了刀具全生命周期管理的概念，将刀具全寿命周期管理划分为计划期、投入期、使用期、报废期四个阶段。

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The prologue explains the concept of the time of "the new era" and defines the problem of "generation" of the main directors in this period.

序言部分界定了作为本文研究视域的“新时期”的历史时间段概念，澄清了活跃在这一时期电影创作中的主要导演的“代”的问题；

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