为便于理解，您需要考虑网格中数据的价值。
To understand this, you have to consider the value of the data in your grid.
在阅读本文的时候，为便于理解，可以参照这两个图。
Refer back to these figures for understanding as you read the article.
cs注意：为便于理解，章节标题和插图使用相同的编号。
EN NB: Chapter headings and illustrations share the same number to aid understanding.
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