Statements about the sentences in papers

The series "collect useful sentences in papers" published in my Blog are all sentences written in each good paper. Most of those sentences are strong statements used in introduction section. Part of those sentences are good organization sentences.

What I did is to copy sentences from the original paper and put in posts. In other word, I did not modify any words in those sentences. Also, I put the reference in each post, which means all sentences in one post are from this reference. If the author want to keep it unpublished in my Blog, please comment in the post, so I will save that post as private.