Messrs Kasich, Scott and Walker all turned down generous federal grants for high-speed rail projects, for fear that they would turn into white elephants.

卡西奇，斯科特和沃克因为担心高铁的风险和收益都拒绝了联邦提供的丰厚高铁补贴项目。

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Then I spotted a lone speed-walker racing down the sidewalk.

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It moves at what Jay Walker called "med speed, " not tech speed.

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Second, they have shed light on something else originally studied by Dr Walker: the optimal speed of the break across the face of the wave.

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