Control system for multi-joint undulatory propulsion robofish using infrared remote control .

基于红外遥控的多关节波动推进机器鱼的控制系统设计。

Effect of lateral undulatory support stiffness of rail on initiation and evolution of rail corrugation .

钢轨横向不均匀支撑刚度对钢轨波磨的影响。

When the leech bites your skin , you will feel some burning and then see the leech making undulatory motions .

当水蛭咬皮肤时，你会感到有些灼痛，会看到水蛭在蠕动。

However the real estate economy has the undulatory property , its fluctuation attacks the financial system inevitably , has the huge financial risk .

然而房地产经济具有波动性，其波动必然冲击金融体系，产生巨大的金融风险。