求翻译：沙漠化是环境退化现象。它使土地滋生能力退化，农牧生产能力及生物产量下降，可供耕地及牧场面积减少。是什么意思？

Desertification is the degradation of the environment. Land breeds capacity degradation and decline in farming productivity and biomass available agricultural land and rangeland reduction.

Desertification is environmental degradation. It will enable the Land degradation, agriculture and animal husbandry breeding capacity and biological production declined in production capacity and are available for farmland and grazing land area decreased.

The desertification is the environment degeneration phenomenon.It makes the land to multiply ability to degenerate, farming and animal husbandry productivity and the biological output drop, may supply the cultivated land and the pasture area reduction.

Desertification is the degradation of the environment. Land breeds capacity degradation and decline in farming productivity and biomass available agricultural land and rangeland reduction.

Desertification is the degradation of the environment. Land breeds capacity degradation and decline in farming productivity and biomass available agricultural land and rangeland reduction.