As we did in previous iterations, we add text labels to identify elements that are subject to requirements and then attach requirements to text annotations.

正如我们在前一个迭代中所做的那样，我们要添加文本标签，以识别需求中的元素，然后将需求与文本注释联系起来。

But direct searching of pictures or videos (as opposed to the words that people attach to describe them) is much harder than indexing and searching text.

但是对图片和视频的直接搜索(人们描述它们时所使用的词语)比对文本形式的搜索困难得多。

At last, this article has drawn such conclusion: we should attach importance to the text-books' humanistic value as well as the knowledge value, which is an ideal teaching state we are chasing.

最后，本文提出，我们在关注教材的知识价值时，也应注重教材的人文价值，这是我们所应追求的教学境界。