11.  On the one hand, we can improve our vocabulary within a short time by translating and memorizing long lists of test words.

12.  However, we cannot remember them well, and we may forget them within some days.

13.  From my point of view, we should learn vocabulary within the western culture, reading is a good way, and we also should take advantage of other kinds of method to help us such as movie, songs, etc.

14.  Owing to the existence of endless boundaries, there will be unending conflicts and misunderstandings within groups and races.

15.  Not any one race over another and not any recognition within certain groups surpass others.

16.  Just like Amelia Valdez mentioned in the article in the barrio, boundaries between the two groups within the same races dissociated them from each other.

17.  An ethnic group is a distinctive group of people within a country.

18.  Within this mountain of books, I'll find every detail of the truth.

19.  According to linguists, one knows a word within about 12 times encounters, so if we make a conservative estimation that one reads 50 words per minutes, then I guess it makes sense why natives never waste time on word lists.

20.  Reading owns the world's most distillate within, while memorizing lists the world's most boring journey-work.