41.  With the advancing of the living level of people, the nutritions of the health is more excessive and the healthy of the People is getting gooder and gooder .

42.  with the increasing of the living level more and more people start to pay more attention to eat those which is useful for the body's building up and so on, in all ways, in the future.

43.  The first , with the development of the society, the living level of the people is better than ever.

44.  With the development of the enomony , the developing countries's health level has take a great improvement .

45.  This explains that the health level of the developing countries has make a great progress.

46.  The devoleping countries have a low industrical level in 1960 so that there is a higher infant mortaility and a lower life expectancy.

47.  Second, the world's medical level have improved.

48.  With the society advacing , people's living level is being improved.

49.  In the past years, the level of people's life is too low to make a living.

50.  As a result, the level of product effective was low, so people's life was short, especially to baby, they were too early to death .