The printed line does not contain information.

打印的行不包含信息。

Sometimes different spellings were used for purely practical reasons, such as adding or omitting letters merely to help the layout or justification of printed lines.

有时纯粹出于实用原因使用不同的拼写， 例如添加或省略字母只是为了帮助排版或印刷行的对齐。