The -a option of cat provides an alternate way of seeing where your tabs and lineendings are.
cat的- a选项提供了另一种方法来查看制表符和行结束符的位置。
2
Select this option to have the editor scan the lineendings in a file and display a message box if inconsistencies are detected in how lineendings are formatted.
如果选择此选项，编辑器便会扫描文件中的行尾，如果检测到行尾的格式有不一致的情况，则显示一个消息框。
3
The bottom line: NeuroSky is trying to bring brain-scanning technology to Hollywood in hopes that studios will create movies with multiple endings.