本文从门寒身素家贫，抄书读书成才和精校精抄等方面，阐述了体现在古人抄书活动中的可贵的读书治学精神。
This article illustrates how some ancient Chinese scholars from poor families make themselves by earnest handwriting and proofreading. Their learning spirit sets a valuable example for people today.
精校机液压伺服系统是保证工件加工精度的关键。
The hydraulic-servo system of the precise straightening machine is the key to ensure the processing accuracy of the workpiece.
它控制要求高、难度大，其性能对精校机的性能影响很大。
Its control requirement is high and difficult. Its performance has a great influence on the performance of precise straightening machine.
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