We covered globbing as this kind of filename expansion trick in the shell scripting and tools.

我们在 shell 脚本和工具中介绍了通配符这种文件名扩展技巧。

If we want to add a file, remove a file, change a filename, or similar, we have to update the information in the Directory File.

如果我们要添加文件、删除文件、更改文件名，我们必须更新目录文件中的信息。

Yet someone had taken the time to alter the filename to read " HOPITAL SB. jpg" ; according to the timestamp, the photograph had in fact been taken a month-and-a-half prior.

然而，有人将文件名改为 “HOPITAL SB. jpg”；根据时间戳，这张照片实际上是在一个半月前拍摄的。

Here since the file has been fed through the script, and we don't know it beforehand, we have to substitute the variable of the filename.

由于文件是通过脚本提供的，而我们事先并不知道，因此我们必须替换文件名变量。