As can be seen from the illustration, the sum of the values from a given ray crossing the segments in its path is zero.

从图中可看出，给定射线与其路径中的段的交叉值总和是零。

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In more serious cases some people are given X-ray treatment or injections with therapeutic substances.

更加严重的话一些人会做X射线治疗，或者注射一下有效的药品。

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What is the portion of my ray that is in the given region?

在给定区域上射线的部分是什么？

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It said that the internal report given to X-Ray lists various legitimate reasons why customers cancelled their warranties and not just cases of potential mis-selling.

BBC: Currys 'mis-sold warranties,' BBC programme X-Ray finds

Former London deputy mayor Ray Lewis has been given a new City Hall role, two years after he resigned amid claims of financial irregularities.

BBC: Former deputy mayor Ray Lewis in new City Hall role

Instead, it's everything else that has been given the shuffle: a smaller Blu-ray drive and more clever overall construction appear to be the tickets to the 20 percent volume reduction compared to the last model.

ENGADGET: Sony's 2012 PlayStation torn down, shows its evolved roots (update: another teardown)