家教固然能促进学习，学习者自身才起主动作用 。
The tutor is the facilitator of learning, while the learner is active.
利用单片机输出的脉宽调制（PWM）信号对脉冲电流进行调节和多个驱动器之间的相互配合作用，实现主动导管的导向动作。
Pulse current is adjusted by pulse width modulation(PWM)signals from the single-chip processor. In addition, multiple $MA actuators' cooperation helps the active catheter to succeed in guiding motion.
弹力带负荷方式下主动肌对完成动作的贡献作用较哑铃负荷方式下更为明显。
The prime mover muscle makes a greater work using the elastic band than using the dumbbells.
应用推荐