Switching between these states allows Grier to move objects back and forth.

格里尔通过转换这些状态来实现向前和向后移动物体。

youdao

So Buchanan wrote to Grier. He told him that a strong decision in the Dred Scott case might do much to bring peace to the country.

所以，布肯南就给格里尔写了封信，他告诉格里尔，在德瑞德·斯科特案件中做出强有力的裁决也许有助于给国家带来和平。

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Instead of pulling objects along a simple straight line, Grier has begun to explore curves, loops and even knotted paths that cross themselves.

除了通过简单的直线光来拉动物体，格里尔已经开始探索用曲线，环线甚至是绳结那样相互穿过路径的光线来拉动物体。

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Grier agreed. He said he would vote with the five southerners.

VOA: special.2009.05.14

Catron proposed that Buchanan write to Justice Robert Grier of Pennsylvania.

VOA: special.2009.05.14

So Buchanan wrote to Grier.

VOA: special.2009.05.14

The BBC reported Duff and Phelps partner David Grier may have known about the Ticketus deal last April.

BBC: Rangers Ticketus deal conversation 'was recorded'

The BBC has obtained a recording of a meeting between Mr Whyte and Mr Grier, which show Duff and Phelps did know.

BBC: Rangers Ticketus deal conversation 'was recorded'

Mr Grier, and Duff and Phelps, denied the claims and said he was unaware of this particular Ticketus deal until August 2011.

BBC: Rangers Ticketus deal conversation 'was recorded'