1.  For example, when we learn English, at first, we don't understand a certain word or a sentence, but if we study it, remember it, and ask the teacher or look up the reference book, we will understand the mean of the word or the sentence, and we will use it by ourselves .

2.  At usuall , it takes me 2 minutes to read a 120 words passages, I can catch the main idea, but if I want to fast to finish the same passage, it takes me 4 minutes to finish it and I can't get the main idea .

3.  He has no aim, no purpose, no stimulation, in an other word- lifeless It is impossible for human being to avoid boredom because it live with this society.