line printing的用法和样例：
例句
- A diagonal mark(/) used especially to separate alternatives, as in and/or, to represent the word per, as in miles/hour, and to indicate the ends of verse lines printed continuously, as in Old King Cole/Was a merry old soul.
斜线号一种斜线符号，尤用于对选择加以区分，如和／或者，表示每 ... 这一词，如英里／小时，和在诗尾表示连续打印行，如老国王考勒／是一个快乐的老人
