force should be smooth
用力要平稳
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Before and after his hands holding a knife to smooth, push the strength should be uniform, to keep horizontal motion, do hand, force uniform, straight road.
两手执刀要平稳，前后推动用力要均匀，要保持水平运动，做到手稳、力匀、路直。
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