题目内容

All the successes of the hiomimetics depend on the ______.

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Velcro is probably the most famous and certainly the most successful example of biological mimicry, or "biomimetics".

The result was Velcro, a product that was arguably more than ______years in the making, since that is how long the natural mechanism that inspired it took to evolve.

Engineers and biologists work together to find natural solutions to technological problems.

Wheels work well on flat surfaces, but are ______.

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