她把第一行歌词唱错了。

She flubbed the first line of the song.

《牛津词典》

每段的第一行应缩格。

The first line of each paragraph should be indented.

《牛津词典》

youdao

And that first one is init this kind of interesting thing, it's two underbars, init, and two underbars. Underscores, I guess is the right way to say it, not underbars.

然后第一行代码是很有趣的东西,这是两个下划线，然后再有两个下划线，下面的划线，我认为应该这么说,而不是下划线。

麻省理工公开课 - 计算机科学及编程导论课程节选

Well, the first line of code, I'll fix the purple next time around so it's more legible.

第一行代码，我用紫色标记,这样增加了可读性。

哈佛公开课 - 计算机科学课程节选

First line says, 0 if i is 0, that means I'm looking at the very last element.

第一行的意思是，如果i的值是，就意味着我看到的,是最后一个元素。

麻省理工公开课 - 计算机科学及编程导论课程节选