A novel method for propagating light-knife by the reflection of Gaussian laser beam at a cylinder is put forward and the formula to appraise the geometry parameters of light knife is also derived.

提出一种利用高斯光束柱面反射展成法生成光刀的新方法，并导出了光刀几何参数的预估算式。

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The knife gleamed as it caught the light.

刀在光照下闪闪发亮。

《牛津词典》

Mike finds a knife beside the bright light and tries to mend his kite.

迈克在那盏明亮的电灯旁找到了一把小刀，并试着修理他的风筝。

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Virtually every morning, it seems, image-makers in the gainful employ of opposition leader Tony Abbott and Prime Minister Julia Gillard conjure up some kind of unimaginative photo-opportunity, where their leaders appear brandishing a blow-torch, a spade, a butcher's knife, an on-button or some kind of piece of light industrial machinery.

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