That is... literally, take something away from the page you're working with.

这是…从字面上来看，从网页上拿掉一些你正在使用的东西。

youdao

So things break if you try-- if the computer tries to take you too literally so it would not be correct generally to do something like that.

如果你把它分开-,那么电脑会逐字逐句地解析,你拆开写的代码,由此得到的结果一般都是错误的。

哈佛公开课 - 计算机科学课程节选