Then, pop back to the original matrix and draw the gray square.

然后，取出原始矩阵并绘制一个灰色正方形。

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Then, draw a medium gray inner bottom border.

然后，以此为中度灰内底边界。

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Through the compare we can draw a conclusion that the gray forecasting precision is the best, the exponential curve method is the second best, and the logarithmic curve method is the worst.

通过比较说明：灰色预测精度最高，指数曲线法次之，对数曲线法最低。

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Alexander stepped up to score his 21st penalty from 22 attempts and although Taylor pounced after Grant had parried Sean Rigg's shot, it was not going to prevent caretaker boss Stuart Gray guiding Burnley into Sunday's draw.

BBC: Burnley 4-2 Port Vale