the operation that prepares for the next character to be printed or displayed on the next line
line feed的用法和样例:
例句
Tag inserts a single line break. 标签可以插入一单独的换行。
All messages in the forward-error-correcting mode should be preceded by at least one carriage return and a line feed signal. 用前向纠错方式的所有电文都应至少冠以一个回车和一个换行信号。