The Italian economic miracle has always been a mystery.意大利的经济奇迹一直是个谜。For years the teaching of acting has been shrouded in mystery.多年以来表演教学一直蒙着神秘的面纱。We set out to find the truth behind the mystery.我们开始着手揭开谜团背后的真相。...
Due to carelessness, his head hit the doorframe with a loud bang.他不小心把头撞到了门框上,一声钝响.Mother held on to the doorframe and almost fell.母亲手扶着门框,几乎跌倒.He flushed the bottom of the doorframe.他把门框的底部调到水平状态....
A cogging torque measurement system was proposed , which was composed of stepping motor, torque sensor, etc.提出了一种由步进电机 、 转矩传感器等元件组成的齿槽转矩测试系统.However, their cogging torque or unbalanced radial force is usually high, deter...