dragonfly flexible wing 模型蜻蜓翼
Is it so different from being surprised by a sunset, or a blade of grass, or a dragonfly wing?
这与惊讶于日落、惊讶于小草的叶片、惊讶于蜻蜓的翅膀有很大的不同吗？
That's right, the designers of helicopter be at studied dragonfly again and again of wing after, pass by to improve continuously function of making the helicopter to just attain perfect result.
没错，直升飞机的设计师们就是在反复研究了蜻蜓的翅膀后，经过不断改进才使直升飞机的性能到达完善成果的。
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