我缓慢的把头转向左边，仿佛在看墙上的砖块，叹息着，然后转向右边，看着屋顶上的裂缝。只有爱丽丝知道我在摇头。

I turned my head slowly to the left, as if looking at the bricks of the wall, sighed.

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对由中心线和左右边缘求裂缝宽度和由左右边缘求裂缝宽度两种方法进行了研究，采用后者作为本课题的计算方法。

I research on two methods of crack width calculating, one is through the center line and left-right edges, the other only through left-right edges, and make the latter as the method of this project.

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