One more important note: in the following lines of code from Listing 7, broken out in Listing 8 below, the code tests each cell to make sure it's not null.
还有一个重点需要注意：在清单7中的以下代码行(在下面的清单8中断开)中，这段代码测试每个单元格，确保它们不为空。
One more important note: in the following lines of code from Listing 7, broken out in Listing 8 below, the code tests each cell to make sure it's not null.
还有一个重点需要注意：在清单7中的以下代码行(在下面的清单8中断开)中，这段代码测试每个单元格，确保它们不为空。
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