反复击打造成一大块青肿。
他建议采用电动机或者有形状记忆功能的材料来反复击打软体契形翅膀的末端,让水产生向后的涟漪从而获得向前的推力。
He suggests using electric motors or shape-memory materials to repeatedly flick the end of a flexible, wedge-shaped wing, creating a wave that ripples backwards and generates forward thrust.
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