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啄木鸟的舌头是安全带？
当你不停的晃动头部，或者脑子和头盖骨移动不同步，两者势必会来个亲密接触，然后你会恶心，想吐，甚至昏迷倒地；可是一只啄木鸟每天高速来回晃动，啄木超过上万（10000+）次数，脑子怎么就没被自己摇碎呢？ Eyeopener今日话题，啄木鸟为什么不会脑震荡？
千万个为什么：保持好奇，持续探索61/86
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