aridity

The name Sahara conjures up images of a desert of aridity .

“撒哈拉”这个名字使人想起干旱的沙漠情景。

Because of regional underground water level continual dropping and climate changing to aridity , land desertifacation and degeneration of glassland and tundra will tend to worse in short period.

由于区域地下水位的持续下降和气候向干旱化发展，土地沙化、草场退化及多年冻土退化短期内将趋于恶化。