41.  These May be the reasons why the great changes in the developing countries .

42.  You May ask what's the reason of this change ?

43.  Because you do it more times, you May find a better way to complete it, or you May do it more quicklier than before.

44.  As a new word, we write it a time , then we May not remember it .

45.  When we do it for two or three times, we May know it a lot.

46.  We May have no sense of a new job or new course at the first.

47.  When you touch new things, you May have difficulty in dealing with them.

48.  This May be called specializing .

49.  Perhaps when you read "Practice Makes Perfect", you May think about its mean .

50.  Through the two exemple , I think we May have some sence about the meaning of "Practice Makes Perfect", and I believe If you practise more, you will be skillful and successful.