Every time light moves into a material with a new speed, it bends and scatters.

每次光线以新的速度穿越一个物体时，它会弯曲，并发生散射。

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So GE designed a blade that twists as it bends. It’s curved backward about eight feet, instead of extending straight out.

因此，通用电气公司有针对性地设计出一种风叶，它会随着风力的加大而向后扭转，最大可以弯曲约8英尺。

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To paraphrase Dr. Martin Luther King, the arc of the federal spending universe is long, but it bends toward restraint.

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It bends because all of us are putting our hand on the arc and we are bending it in that direction.

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It bends upward again with the second industrial revolution of the late 1800s built on the internal combustion engine, electricity and telephony.

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