That is, if we include the doubleblank there are four patterns.
这就是说，包括两个空位在内，总共有。
2
Similarly, if a double comma is entered as user data, then the channel exit at that position in the list will get user data consisting of a blank String.
类似地，如果输入两个逗号作为用户数据，那么列表中该位置的通道出口将获取由空白字符串组成的用户数据。
3
Easy to miss if you're not looking for it: you can double-click on any DVD or CD.iso image and you'll see a helpful little applet that will enable you to burn the image to a blank disc.