So I've added one line of code.

所以我添加了一行代码。

That you've added these lines, and...

意思是这些内容是您后来加上去的。

So long and so earnestly gazed he, that her cheek deepened to a more and more crimson tint as each line was added to her song.

他如此认真地凝视了这么久， 以至于她的脸颊随着每一句歌词都被添加到她的歌曲中而变得越来越深红。

You see, the law only applies to sites that know their users are under the age of 13. So those slithery tech companies simply added this line to their terms and conditions.

你看，法律只适用于知道他们的用户未满 13 岁的网站。所以那些狡猾的科技公司只是将这行添加到他们的条款和条件中。