If not NULL, increment the line counter.

如果不是NULL，则增加行计数器。

youdao

The logic used for form-feed-delimited pages is roughly the same, but slightly simpler, as there is no need for a line counter: Read char by char using the getc library function.

用于换页定界的页的逻辑大体上相同，只是稍稍简单一些，因为不需要行计数器：使用getc库函数逐个读取字符。

youdao

Similarly, if you’re in line for lunch and the folks behind the deli counter are taking their time, don’t just say, “Gee, this line is moving so slowly.”

相同地，如果你在排队买午饭，而你在等的那个美食柜台后面的工作人员磨磨蹭蹭的，不要说：“呀，排了半天都没动过。”

youdao

For one thing those on the front line in counter-terrorism warn that it risks cutting off vital local intelligence and serving as a recruiting sergeant for terrorists.

BBC: NEWS | UK | UK Politics | David Davis speech in full

Thirteen minutes into the first period, he sealed off the lower half of the net to fend off a partial breakaway by Capitals defenseman Mike Green, and on the Rangers' ensuing counter rush, their fourth line struck for a surprising goal and a 1-0 lead.

WSJ: Rangers Score a Bundle to Dismiss D.C.

The usually reliable Carter lost possession near the Wallabies try-line and on the counter attack, full-back Beale sprinted two-thirds of the field, running at an angle to stretch the New Zealand defence and touch down.

BBC: New Zealand 20-10 Australia