求翻译：1980年沙化面积560公里，沙尘暴频率8次.1990年扩张为810公里，沙尘暴频率为12次.而2000年扩张面积980公里，沙尘暴频率为16次。由于沙漠化的严重扩张，我们应采取相应的措施，扩大植被面积来维护我共同的坏境是什么意思？

1980 sandy area of ​​560 km, frequency of dust storms in the expansion of 8 .1990 810 km, sandstorm frequency of 12 times in 2000 expanded area of ​​980 km, frequency of dust storms 16. As a serious expansion of desertification, we should take appropriate measures to expand the area of ​​vegetation

In 1980, the sandstorms deserts area is 560 km 8th .1,990 frequency expansion in order to 810 km, the sandstorms frequency is 12 times the 2000 expansion . 980 km area, the sandstorms frequency is 16 times. Because of the serious expansion Desertification, we shall take appropriate measures to expan

In 1980 the desertification area 560 kilometers, the sand storm frequency 8 .1990 year expansions were 810 kilometers, the sand storm frequency are 12 times. But in 2000 expanded the area 980 kilometers, the sand storm frequency is 16 times.As a result of the desertification serious expansion, we sh

1980 desertification area of 560 km, sand-dust storm frequency 8.1990 expansion of 810 km, sand-dust storm frequency is 12.2000 expansion area of 980 km, sand-dust storm frequency as 16 times. Because of serious expansion of desertification, we shall take appropriate measures to expand vegetation co

1980 desertification area of 560 km, sand-dust storm frequency 8.1990 expansion of 810 km, sand-dust storm frequency is 12.2000 expansion area of 980 km, sand-dust storm frequency as 16 times. Because of serious expansion of desertification, we shall take appropriate measures to expand vegetation co