Caterpillars move by a wave that starts at the back end of their body and sweeps through each segment until it reaches the head, pushing it forward.
毛毛虫移动时的每一波都是从身体的后段开始，然后这个波穿过身体的每一部分，一直到达头部，进而将整个身体向前移动。
As you master the drill, you main focus is to have you head move within the body wave, move it forward as you breathe, and let it lead your body into the water without pause.
当你掌握了这个练习以后，你的焦点应该集中在你的头的移动是否在身体波浪中，呼吸时向前，让头引领你的身体没有停顿的进入水中。
The motor, placed in the fish's midsection, initiates a wave that travels along the fish's flexible body, propelling it forward.
发动机置于鱼 的上腹部，它所发动的电波会传送至鱼的全身，从而驱动其向前移动。
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