1.  In 533~ 544 AD, he wrote a book which included advice on improving the condition of sool , growing gree vegetables and furit trees, keeping cows and sheep, and keeping fish in lakes.

2.  So people can get enough food to eat and people's health condition is improved.

3.  The medice conditions are improved, The developing counties can deal with many diffient illnesses, So that the developing countries's life expectancy became higher.

4.  The first reason is that the living condition is improved.

5.  The living condition is improved.

6.  With the developing of economic , the people's living condition has been improved in developing countries.

7.  First of all, developing countries have generally come up with the devoloped countries, so that the people's living condition is improved.

8.  The people's living conditions are much improved.

9.  It indicates their life conditions were improved greatly in developing countries.

10.  Second, the medical conditions have been improved too.