Let's swivel it around for just a moment, so we have a blank slate and now what's really going on?
让我们把它转一下，这样我们就有了一块空白，现在到底发生了什么?
It might be important to preserve it blank, but otherwise, it is inconvenient to have to turn two pages when only one should be necessary.
可能有必要将它保持空白，否则，在仅需要一个页面时必须生成两个页面，这样很不方便。
After all the lines have been processed, the END block will execute, and awk will print out a final summary, specifying the number of blank lines it found.
在所有行都处理完毕之后，awk执行END代码块，并打印最终的汇总信息，以显示它找到的空白行数。
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