Many cars have a "shift Light" or indications on the speedometer that will tell you when you need to shift so you don't rev the engine too fast.

许多车在速度表上有“换挡指示灯”或标识，提示您什么时候应该换挡，别让引擎转速过高。

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In light of the Pakistani Taliban's alleged involvement, some speculate there could be a shift in US policy toward Pakistan.

VOA: standard.2010.05.18

If you change your focus from near to far, the shift in light quality is almost imperceptible.

WSJ: The Petzl Nao: A Smarter Light | At Play

On the Newt 2012 sign hanging above the double doors is a make shift laser light show blinding Newt out.

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Then the light and perspective shift, and the domes begin to bulge and take on dimension.

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