Thanks to Microsoft word for their auto correction, I did find two spelling mistakes in the paragraph above Fig. 1., that is "correctibility" and "typefonts". I do not think the author has Word installed in this computer. So just take this question as an advertisement for Microsoft :).

I posted the notes of MIT because anyone else may get here in the future to find answer about good writing(at least the standards that they need to follow for an assignment), then they can know something. I never have a meanning like "challenge you", how do you think me like that? I respect you guys very much, and I have really received a lot of help from you. The conclusion may be that different grops may have different judgement towards good writing. To be honest, I am now not in favor of this article, because it has focused too much on the fancy language skills that you mentioned hence it costs more reading time of ordinary readers especially when the author wants to say are very simple things. Maybe the way I ask this question is also a differece between our two cultures, I did not realize this question in your culture may hurt you so much... If this is the case, I would definitely say sorry to you.

You totally misunderstood me! At the very beginning, I cannot judge if it is written by a native speaker, and if it is well written, because it is a example that our professor (native speaker) thinks a poor written essay that needs to be modified. But I found the author is an expert in technical communication, so I just cannot understand why his writing is a bad example that our professor gives. This is why I came here to get the answer, then I know from you it is not because of mistakes or errors, but the concreteness and conciseness (by google search I found that notes). So I did not know the intention of my professor, it is your guys help me know that! If the article is perfect, I have nothing to do with my assignment and this course, this is why I keep looking for answers. But the professor did let us to identify "a minimum of 10 spelling, grammatical, structure errors and other concerns", this is the contributor to this question thread, and by the way now I know it is quite challenging...

I can not find a single grammatical error, but there are some confusing things. For example, I feel "science, medicine and technology" in first paragraph may be an error, since medicine is actually a field of science, and even we do not consider concept overlapping and take science as "natural science or pure science" like maths, physics and chemistry, it is still quite confusing to just mention medicine here since it is not a medical report. Why doesn't he mention engineering or something else? It seems he is saying something like "animals, dogs and plants" in a biology article. I do not like finding these kinds of errors, just for finishing my assignments...